A Guide to Climbing Gym, Zipline, Ropes Course, Bungee, and Theatrical Rigging Litigation

Table of Contents

1. ·Introduction: Gravity Never Settles
2. 1The Vertical Recreation Boom
3. 2The Anatomy of an Accident: Case Types and Prevalence
4. 3Bungee Jumping and the Single Point of Failure
5. 4Theatrical Rigging: Loads Over People
6. 5Investigating the Case
7. 6The Role of the Expert Witness
8. 7Building the Plaintiff Case
9. 8Building the Defense Case
10. 9Strategies for Winning
11. 10The Reference Library
12. 11Case Files from the Field
13. ·About the Author

Gravity Never Settles

Investigate what the system was designed to do, who controlled its operation, what happened and whether a supported precaution would have prevented the injury. Do not assume that an injury establishes a system failure.

I have spent more than fifty years on ropes. I have climbed in the United States, Switzerland, and South America, worked as a professional guide, judged sport climbing competitions, built and operated challenge courses for clients including Nike, Google, MTV, and the New York City Department of Parks and Recreation, and rigged live human loads on hundreds of film and television productions, where the tolerance for error is zero and the cameras are always rolling. I hold a world record in ziplining. I have also stood in courtrooms and explained to juries, in plain English, exactly why a climber hit the floor.

That dual life, builder and witness, is the premise of this book. The person who has actually tensioned a zipline cable, raked a bouldering floor, inspected an auto belay, and lowered a frightened first-timer off a wall sees these cases differently than someone who has only read about them. The physical evidence talks. You just have to know its language.

This guide covers the full family of vertical recreation cases: indoor climbing gyms and bouldering facilities, aerial adventure and ropes courses, commercial and improvised ziplines, mobile climbing walls and inflatable rentals, and guided outdoor climbing. The engineering differs; the litigation anatomy is remarkably consistent. A duty of care commensurate with the gravity of the foreseeable harm. A body of recognized industry standards. A waiver. A dispute about what really happened in the two seconds before impact. Explain harnesses and equipment without assuming the jurors' prior experience.

I have worked these cases for plaintiffs and for defendants, in roughly equal measure, and I intend to keep it that way. An expert who only ever finds for the side that hired him is not an expert; he is a megaphone. The expert should apply the same methods and evidentiary standards regardless of who paid the retainer. Where the record cuts against the side that retained me, I say so. That candor is not a handicap. It belongs alongside relevant qualifications, reliable methods and a supported analysis.

Reconstruct the fall or ride from measurements, physical evidence, records and witness accounts. Explain which mechanisms the evidence supports, which it contradicts and what remains unresolved.

The Vertical Recreation Boom

Climbing used to be a fringe pursuit practiced by a small tribe who taught each other, checked each other, and accepted the mountain's terms. Today it is a mass-market amusement. Climbing walls anchor shopping centers and cruise ships. Ziplines run through ski resorts, church camps, and backyard birthday parties. Aerial adventure parks have multiplied across the country. Climbing is an Olympic sport, and facilities must assess the experience and instruction needs of the customers they serve.

Commercial operators select equipment and control aspects of the site, instruction and supervision. Participants also differ in experience, knowledge and conduct. Identify the responsibilities and actual actions of each rather than assuming the operator supplied all judgment or eliminated the danger.

Determine the jurisdiction's rules for the activity, including operator duties, assumption of risk and comparative fault. Evaluate control of the equipment and site, the foreseeable harm, instruction and participant conduct. Operator conduct does not alone determine the outcome.

The venues, and why the distinctions matter

Roped climbing gyms protect climbers with a belay system: a human partner, a staff belayer, or a mechanical auto belay that pays out cable as the climber ascends and lowers them when they let go. The protection is active. It must be attached, engaged, and operated correctly on every single climb, so investigate whether the climber attached correctly and whether the belay equipment and operation functioned as intended.

Bouldering facilities use no ropes. Walls are short, typically twelve to fifteen feet. The landing surface provides impact attenuation, but route design, instruction and supervision also require review. Inspect the floor's condition and maintenance against the requirements for the installed product.

Ropes courses and aerial adventure parks move participants through elevated obstacles on continuous or transferable belay systems. They add a third failure dimension: course design and rigging. Anchors, cables, terminations, and hardware are engineered structures carrying live human loads, and they answer to engineering standards, not to enthusiasm.

Ziplines use gravity to move a rider along a cable. Investigate cable geometry, rigging, rider attachment, braking and the landing zone. Technical classification informs the analysis, but legal and insurance classifications require the governing rules and policy wording.

Bungee jumping uses an elastic cord to arrest a deliberate fall. Identify the actual cord arrangement, connections and backup provisions rather than assuming a single configuration. Review selection calculations, attachment checks and the supporting structure. Chapter Three addresses these mechanisms.

Mobile and rental equipment includes portable climbing walls, inflatable attractions with climbing elements and event ziplines. Investigate temporary installation, staff training, participant throughput and the inspection arrangements for the specific event.

Guided outdoor climbing, including rock and ice guiding, replaces the engineered environment with professional judgment. The guide's instruction, communication, and supervision become the safety system, and the standard of care is the practice of competent professional guides.

Keep these categories straight from the first client interview, because each one carries its own standards, its own duty profile, and its own expert disciplines. The single most common analytical error I see in these files, on both sides, is borrowing the wrong framework: judging a bouldering floor by roped-climbing logic, or defending an improvised zipline as if it were mountaineering.

The Anatomy of an Accident: Case Types and Prevalence

A prospective study following more than half a million gym visits recorded about thirty climbing injuries requiring medical response. That observation does not establish the severity or preventability of all climbing injuries. Investigate the particular fall, protection, injury and proposed preventive measure rather than inferring negligence from the harm.

Across my own case file and the published record, the accidents sort into seven recurring patterns. Use these patterns to organize intake questions without assuming they cover every mechanism.

1. The unattached climber

A climber wearing a perfectly good harness ascends a wall without ever connecting to the auto belay or rope, reaches the top, leans back to be lowered, and free-falls. Evaluate the available countermeasures and their suitability for the facility: belay gates and barriers that physically block the route until the climber clips through, large point-of-decision signage, harness tags, ground anchors that visibly tether the carabiner, audible alarms, mirrors, and active floor supervision.

Reconstruct the climber's final movement from video, witness accounts, impact location and equipment evidence. Distinguish a deliberate jump from an attempt to load an expected belay. That distinction informs causation but does not replace analysis of attachment controls, instruction, supervision or participant conduct.

2. Belay failures

Roughly a third of indoor roped-climbing accidents in the published injury research trace to belay error: a dropped climber, a mismanaged device, too much slack, or a failed communication between climber and belayer. In guided and institutional settings, examine the belayer's conduct and the operator's training and supervision separately. One manufacturer of climbing towers conducted a decade-long internal study and concluded that the majority of accidents on its structures were caused by belayer error; when a later plaintiff was dropped, that study became the proof that the danger was known and unanswered, and it supported a multimillion dollar result.

Communication failures deserve special attention. In the Ouray ice climbing fatality discussed in Chapter Nine, a belayer released the rope after mishearing a climber's shout, while the instructor, hoarse with bronchitis, could not make himself heard in time. Standardized, closed-loop climbing commands exist precisely because shouted improvisation kills people. When a program does not teach, enforce, and verify those commands, that is not bad luck. That is a departure from the standard of care.

3. Flooring and impact attenuation failures

In bouldering, investigate the landing surface as part of the protection system and assess the applicable premises and product theories. The questions are concrete and measurable. What material was chosen, and was it appropriate? What depth or thickness did the manufacturer specify? Was there a written inspection and maintenance routine? Was it followed and documented? Was the protection uniform across the landing zone, or did it thin out exactly where falling climbers land?

Inspect loose-fill surfaces such as shredded rubber mulch for displacement and inadequate depth. Identify the manufacturer's depth requirement for the installed product and compare it with measured conditions. Record bare spots and shallow zones, together with maintenance records and evidence of the incident-date condition. That appearance is itself a concealed danger: the climber sees rubber and reasonably believes she is safe, when the actual protection beneath her landing point may be an inch of material over hard subfloor. In my Chen v. Dumbo Boulder inspection, I documented exactly that condition, and the geometry made it worse: the walls leaned toward the climber, so the higher she climbed, the farther she drifted from the wall base and over the shallowest material. The inspection geometry requires comparison with the climber's actual path and impact point.

4. Zipline braking and landing zone failures

For a zipline braking case, reconstruct rider speed, cable geometry, braking action and clearance at the landing zone. Identify any task assigned to the rider and whether the rider received and could execute the instruction. Compare feasible engineering controls with the actual arrangement. A shouted instruction alone does not establish what the operator knew or which control would have prevented the injury.

The landing zone is the second hot spot. Decks, platforms, steps, and surface anomalies in the rider's path are perfectly positioned to break legs. And when an operator notices such a hazard and covers it with carpet instead of removing it, the operator has done something worse than nothing: it has concealed the danger while leaving it fully functional. I documented exactly that in Monroe v. Camelback, and photographs should show the deck edge, covering and rider path with measurements and context.

5. Improvised and amateur rigging

Investigate whether the system had an engineering basis: a cable strung between two trees, a makeshift sling pressed into service as a brake, a backyard or one-day event installation built by enthusiasm rather than by standards. In one of my matters, an outing operator steepened a line between trees to make a faster ride and handed the rider a nylon sling to use as a friction brake; the sling melted through and the rider hit the terminal tree at roughly twenty-five miles per hour. The Association for Challenge Course Technology publishes detailed standards for zipline design, equipment, and operation. Compare the installation with applicable standards and evaluate departures, causal effect and defenses. Assess coverage separately.

6. Coverage and classification disputes

Coverage disputes require the policy wording and a supported description of the activity. I have served as a classification expert where an insurer disputed whether a zipline accident fell within guided mountaineering coverage. Examine slope, propulsion, rider effort, braking and purpose when comparing a zipline with a Tyrolean traverse. Technical characteristics inform classification; counsel and the court determine their legal effect under the policy.

7. Supervision, instruction, and orientation failures

Review orientation, instruction, competency checks and supervision against the participant's experience and the activity's requirements. Obtain records of what staff taught, checked and observed. In matters involving minors or institutional groups, identify each supervisor's assignments without assuming supervision was the cause of every injury.

Where the cases actually come from

Investigate potential equipment defects alongside operational conduct. The cited auto belay matter involving an alleged defect and a recalled product line settled for six million dollars. That settlement does not establish the frequency or value of other product cases. Compare product condition and testing with inspection, maintenance, instruction and supervision records.

One activity in this family runs on a different and less forgiving principle, with its own engineering, its own standards, and its own ways of failing. The next chapter takes it up on its own terms.

Bungee Jumping and the Single Point of Failure

A bungee cord arrests a deliberate fall by stretching. The operator selects the cord and configuration, attaches the jumper and manages the platform. Inspect the actual system for backups and identify the consequences of each potential failure. Do not assume every bungee system has one connection or no secondary protection.

How the system actually works

A bungee jump is a free fall converted into a damped oscillation. The jumper falls under gravity until the cord reaches its natural length, then the cord begins to stretch and absorb energy, slowing the body over the lower part of the arc and reaching its greatest stretch and greatest force near the bottom. Cord selection requires analysis of the height available below the jump point, the unstretched length of the cord, the elastic behavior of that specific cord, and the mass of the jumper. The cord must be long enough and elastic enough to decelerate the body comfortably, and short enough that the body never reaches the ground or the water at the bottom of the stretch. A heavier jumper stretches a given cord farther than a lighter one, so the cord is selected for the person, not the person for the cord. Evaluate the pairing alongside attachment, cord condition, structural capacity and clearance.

Identify independent load paths, backup connections and verification procedures in the actual installation. If a single component failure can cause an unarrested fall, examine the measures intended to prevent or contain that failure. Determine the applicable duty from the system, standards and law rather than from an assumed industry configuration.

Where bungee jumps fail

The published record and the regulatory history sort bungee failures into a short list of recurring modes. More than one failure mode can contribute, and the record may not resolve the sequence.

Cord length and weight miscalculation. Compare the selected cord's length and elastic behavior with the jumper's weight and available clearance. Identify who selected the cord, the calculation used and the supporting records. Test whether a mismatch contributed to the reported impact alongside cord condition, attachment and the actual fall path.

Failure to connect the jumper. It seems impossible that a crew would launch a person without completing the attachment, and yet it happens, and when it happens it is almost always fatal. In a 2026 fatality in São Paulo state, a crew operating from an abandoned bridge with no oversight sent a young woman off the platform before the safety connection was made. This is the bungee analog of the unattached climber, with one difference that matters enormously: a climbing gym can install a belay gate that physically blocks an unclipped climber, while a bungee platform protects against the same error only through a disciplined, verified, two-person connection check. Where the operator has no such protocol, the entire defense against the deadliest error in the activity is one employee's memory.

Component and cord failure. A bungee system is a chain of single components: the cord, the connection between the cord and the harness or ankle attachment, the carabiners and hardware, the body or ankle harness itself, and the anchor. Cords fray, age, and lose their rated performance with ultraviolet exposure and accumulated jumps; carabiners fail when misloaded or worn; ankle attachments slip when fitted carelessly. Manufacturers publish retirement criteria, jump-count limits, and inspection schedules for exactly this reason, and a system with no redundancy cannot tolerate a skipped inspection.

Anchor and platform failure. Bungee jumps are staged from bridges, purpose-built towers, construction cranes, and hot-air balloons, and each of those structures carries a dynamic, oscillating live load very different from a static weight. The anchor and the structure answer to engineering, not to enthusiasm, and an improvised platform on an unengineered structure is the bungee version of the cable strung between two trees.

Catapult, reverse, and tandem variants. Reverse bungee, also called catapulting, stretches the cord while the jumper is held at the ground and then releases the jumper upward, loading the system in the opposite direction and at higher energy. For tandem jumps, determine whether the system was designed and calculated for two jumpers. Check jurisdiction-specific restrictions; New Jersey's amusement regulations, for one, ban catapulting and tandem jumping by rule.

Environmental and rebound hazards. Wind can push a jumper into the bridge pier, the tower, or the crane mast during the fall or the rebound, and the long vertical rebound zone must be kept clear of structure and bystanders. A jump that is geometrically safe in still air can become a collision in a crosswind.

Injuries on a textbook jump. Even a flawless jump imposes large forces on the body in a head-down orientation. The medical literature records retinal and other eye injuries from the pressure spike, along with whiplash, cervical and spinal strain, vascular injury, and ankle trauma at the attachment point. That is why medical screening and honest pre-jump questioning are part of the duty and not a formality, and why selling a jump to someone with a disqualifying condition is its own kind of failure.

Bungee is an amusement device, not a sport

Check whether the jurisdiction classifies the actual bungee operation as an amusement ride or device. Identify licensing, inspection and operating requirements in force at the incident date. Use the installation's technical features, commercial arrangements and policy wording when assessing classification; no one label resolves every legal question.

How I analyze a bungee matter

Examine the structure, cord, connections, calculations, operating procedures and records. Identify the potential failure sequence before narrowing the inquiry to a particular component.

• The calculation. What cord was selected for this jumper, against what drop height, on what record of the jumper's weight, and who performed and checked the selection. Investigate an absent record through the selection procedure, available measurements and witness accounts; absence alone does not establish an incorrect pairing.
• The cord's history. The manufacturer's specifications, the cord's jump count and date placed in service, the retirement criteria, and the inspection log. A cord is a consumable with a defined service life, and the absence of a log is a finding in itself.
• The connection and its verification. The exact attachment used, the hardware ratings, and, above all, whether a disciplined two-person check confirmed the connection before the jumper left the platform. Assess whether the verification process could detect the attachment error supported by the evidence.
• The structure. The engineering of the anchor and the platform, the dynamic load path, and the inspection and acceptance records for the bridge, tower, or crane.
• The medical screening. What the operator asked, what the jumper disclosed, and whether someone with a disqualifying condition was sold a ticket anyway.
• The operator's own shelf. The operations manual, the pre-jump checklist, the staff training and certification records, the prior incident file, and the marketing that classified the activity and promised the safety. Compare these documents with applicable requirements and evidence of actual work.

Compare calculations, connection checks and engineering records with the physical evidence. Determine what each record establishes and what remains uncertain. A documented procedure does not prove execution, and an absent record does not by itself establish the cause of a fall.

Theatrical Rigging: Loads Over People

Theatrical rigging is the discipline that recreational rigging borrowed from. The scenery flying above a Broadway stage, the climber on an auto belay, and the rider on a zipline all hang from the same family of parts: ropes, wire rope, carabiners, shackles, pulleys, and sheaves, governed by the same gravity. Two things separate the theater from the gym. The loads in a theater, scenery, lighting, and the performers themselves, hang directly over the heads of other performers and a paying audience, so a dropped load is not a fall onto a mat but a strike on a person who never consented to be beneath it. And the work runs on a schedule that does not forgive delay, under a culture that says the show must go on. I have built and operated these systems, and I served as the lead investigator and expert on a performer-flying investigation. Identify the people exposed beneath each load and the controls intended to protect them.

The gear, and what each part is asked to do

Rope. Natural-fiber and synthetic rope still runs hemp houses and serves as operating line, hand line, and spot line. Inspect rope condition and termination: a knot can remove a third or more of its strength, and age, abrasion, and ultraviolet exposure weaken it invisibly. The questions in a rope case are always the same: what rope, what knot, what age, and what load.

Wire rope and aircraft cable. The workhorse lift line. Its strength is real only if the termination is real: a swaged sleeve made with the correct die, a thimble protecting the eye, and, where cable clips are used, the right number of clips at the right spacing installed the right way around. The oldest rule in cable work is that the saddle goes on the live side and the U-bolt on the dead side, never the reverse. Examine clip orientation, thimbles and swages for departures and causal significance.

Carabiners, shackles, quick links, and rings. The connectors. Entertainment work uses load-rated hardware, marked with a working load limit, loaded along its major axis, with gates and pins secured. The recurring failure is substitution and misuse: an unrated hardware-store carabiner standing in for a rated connector, a connector side-loaded across its gate, or climbing gear rated for one fall pressed into service holding a load over an audience for an entire run.

Pulleys, blocks, and sheaves. Loft blocks, head blocks, and mule blocks redirect lines and build mechanical advantage. A sheave that is too small for its cable fatigues and breaks the wires from the inside; a misaligned block chews the rope or cable at the flange. Compare sheave and cable dimensions with the manufacturer's requirements, and assess loading, alignment, wear and service history.

The systems these parts build. Hemp houses lift loads on hand-hauled rope. Manual counterweight systems, single-purchase and double-purchase, balance a batten against an arbor full of weights, held by a rope lock that positions the set but is not a brake. Powered hoists and automated fly systems move loads under motor control. Arena rigging suspends truss and loads from chain hoists in spaces never designed as theaters. Performer flying systems lift and fly human beings. Each system carries its own standard, and the analysis must not apply one system's rules to another without establishing their relevance.

Where theatrical rigging fails

Overload and design factor. Identify the required design factor and working load limit for the actual system and use. Compare those requirements with static and dynamic loads. Do not treat inadequate capacity as the source of unrelated attachment, control or maintenance failures.

Termination failures. The cable did not break in the middle; it pulled out of its end. Backwards or insufficient wire rope clips, a missing thimble, an improper swage, or a knot tied in wire rope are the classic terminations that fail under the dynamic load of a moving scenic piece.

Connector misuse. An unrated connector, a worn or cracked carabiner, a shackle pinned with the wrong pin, or any connector loaded across its minor axis. Hardware is rated for a reason, and the rating is meaningless if the part is loaded in a direction the rating never covered.

Counterweight imbalance and the runaway. Loading or unloading a lineset while it is out of balance lets the heavier side run away, sending an arbor full of steel down the locking rail or a batten up into the grid, striking whoever is in the path. The controls are a disciplined load and unload sequence, spotting, and never trusting the rope lock as a brake. Investigate the loading sequence, imbalance, restraints and supervision before assigning the cause of a runaway.

No secondary safety over people. A lighting fixture, a speaker, or a scenic unit hung above performers or audience with nothing but its primary support, so that one failed clamp, cable, or connector drops it onto a head. Redundancy is the rule whenever the consequence of a single failure is a load on a person, and a safety cable or bond is cheap insurance against a dropped-load hazard.

Automation and powered-hoist failures. Limit switches that were never set or were defeated, a hoist with no secondary brake on a load that travels over people, control and encoder faults that send a load to the wrong place, and the absence of a working emergency stop within reach of someone who can see the hazard.

Performer flying failures. A fall can be catastrophic because the load is a person and the floor is often far below. The flying line that was never connected is the theatrical twin of the unattached climber, and it has killed and maimed performers. Alongside it sit harness fit, line and track management, choreography that outpaces what the equipment can safely do, and the absence of a trained spotter and a flying director with the authority to stop.

Falls during load-in and load-out. The injuries that never reach the stage. Crew working at height to hang and strike a show fall when fall protection is treated as optional under the pressure of a load-out clock. The duty to protect workers at height does not pause because the call time is tight.

Performer flying is its own discipline

Performer flying requires examination of the applicable performer-flying standard, risk assessment, assignments, acceptance testing and redundancy provisions. Trace the load path from anchor to harness. Inspect connections, equipment capacity, inspection records, choreography and stop authority. A missed connection is one possible mechanism, not a substitute for analyzing the complete system.

How I analyze a theatrical rigging matter

The framework is the load-path analysis this book applies to every rigging case, walked component by component from the building structure down to the load or the performer and back up through the paperwork.

• Identify the rigging system, its use and the relevant standard. Check the standard's scope, incident-date edition and legal or contractual applicability before selecting provisions.
• Reconstruct the load path. Anchor and structure, head block, lift lines and their terminations, the connecting hardware, the batten or truss, and the unit or performer at the end. Evaluate each component and connection under the supported loads; a load-path diagram alone does not identify the failed part.
• Inspect the terminations and connectors physically. Photograph and preserve the swage, the clips, the thimble, the carabiner, the shackle. Preserve relevant hardware and document its condition and chain of custody.
• Check the design factor and the balance. What did the system weigh, what was it rated to carry, and was a counterweight set balanced before it was loaded or unloaded. Compare the weight buildup and load schedule with measurements and evidence of the actual loading sequence.
• Identify any required secondary support, whether it was present and how it functioned. Evaluate whether the proposed backup could have arrested the supported failure mechanism.
• For automation, examine the brakes, limits, and stops. Secondary brakes over people, limit-switch settings, control and encoder records, and a reachable emergency stop.
• Establish the rigger's qualification. Whether the person who built and inspected the system held the recognized entertainment rigging certification, and whether a qualified person inspected it on the schedule the standard requires.
• Read the production's own shelf. The rigging plot, the weight buildup, the inspection logs, the run sheets, the prior incident reports, and the safety meeting records. Compare these records with applicable standards and physical findings.

Reconstruct terminations, balance, secondary support and performer connections from records and physical evidence. Identify any conflict between the records and the recovered system. Preserve uncertainty where the evidence cannot establish the incident configuration or the failure sequence.

Investigating the Case

Preserve the scene and records promptly. Repairs, maintenance, reuse and fading recollections can change the available evidence. Document later changes rather than assuming an inspection reproduces the incident conditions.

Get the expert in early

Retain relevant expertise early enough to guide preservation and discovery. The initial review should identify candidate mechanisms, necessary documents, inspection priorities and unresolved questions. Do not treat a rapid consultation as a complete merits determination.

The site inspection

Inspect in person, formally, on notice, with counsel for both sides present, and document with photographs, video, and measurements. Practical rules from a few hundred inspections:

• Measure accessible wall heights, fall distances, padding depths, deck edge heights and cable angles. If an incident condition cannot be measured directly, identify any estimate and explain its evidentiary basis, assumptions and uncertainty. In a bouldering floor case I work with depth probes and a calibrated inclinometer; a chart of measured surface angles documents the inspection condition and should be compared with maintenance requirements and incident-date evidence.
• Photograph the boring things. Signage and its sightlines from the customer's actual path. The view from the check-in desk: can staff actually see the climbing floor from where they stand? The condition of the padding seams. The brake components. The wear marks that show how things were really used.
• Document the scene as found and establish how it differed from the accident date. Use earlier photographs, maintenance records and witness accounts to assess any change. An announced inspection showing shallow material establishes the inspection condition, not automatically the floor's ordinary or incident-date condition.
• Reconstruct the geometry. Where was the climber's body at the moment of release, and what was directly beneath it? Wall lean matters: on overhung or climber-tilted walls, the top of the route is not above the base of the route. Map the actual impact point against the actual protection at that point.
• Interview the injured person at the scene if possible. Walking the route with the client produces details no conference room ever will: where it felt squishy, where it felt like concrete, what the staff said, what the orientation actually contained.

The document demands

The records tell you whether the safety program existed anywhere except the marketing copy. Demand, at minimum:

• The incident report and any internal investigation file, including photographs taken by staff that day.
• All operations manuals, employee handbooks, written policies, and the risk-management plan in effect on the date of loss. Then read them against what the staff actually did; the manual describes intended procedures, not necessarily their execution or legal force.
• The orientation materials: scripts, outlines, videos, check-off forms, and any record showing what this participant was actually told and what competency was actually verified.
• The signed waiver and the entire check-in workflow that produced it.
• Equipment identification for the exact system involved, with the manufacturer's instructions for use, inspection requirements, service intervals, bulletins, and recalls. For auto belays, demand the daily inspection logs and factory service records by serial number.
• Flooring specifications, the manufacturer's installation and depth requirements, and every inspection or maintenance log touching the protective surface. The absence of any such log is itself a finding.
• Staff training and certification records, schedules showing who was on the floor at the time, and staffing levels against occupancy.
• All photographs, surveillance video, and prior incident reports or complaints involving the same equipment, route, or hazard. Establish material similarity, timing and the operator's knowledge before using earlier incidents to support foreseeability.
• Third-party inspection reports: annual professional course inspections, acceptance testing, and any engineering review of the structure.
• Marketing and social media. Preserve the operator's descriptions of the activity and safety representations. Compare those statements with the actual operation, participant communications and policy wording. Advertising alone does not determine legal classification or duty.

The depositions

Work with the expert before depositions to identify questions the existing record cannot answer. Ask who inspected the equipment, verified orientation, supervised the floor, maintained the landing surface and responded to prior incidents. Compare each answer with records and physical evidence rather than assuming a witness's training account resolves liability.

Preserve everything, immediately

Send the preservation letter on day one: surveillance video on short retention loops, the device itself in its post-accident condition, the harness, the lanyard, the sling, the carpet on the deck edge. In one of my zipline matters the melted brake sling was the single most important object in the case. Physical evidence of that kind must be photographed, preserved, and chain-of-custodied like the crime scene exhibit it effectively is.

The Role of the Expert Witness

The expert should explain supported technical findings, competing explanations and limits. Clear testimony helps the jury evaluate evidence; clarity does not determine which party should prevail.

Educator first

Explain catenary curves, impact attenuation, fall factors and belay procedures in ordinary language. Use a hanging chain to illustrate a catenary, then identify the other inputs needed to calculate rider speed. Define technical terms and disclose uncertainty without assuming what jurors already know or will repeat.

The hands matter

Practical experience can help an expert examine equipment and operating conditions. A sling-melting opinion still requires evidence of material, friction, loading and exposure, supported by a reliable method. Explain how experience informs the analysis rather than treating experience as a substitute for supporting data.

Candor is the weapon

Present the force and limits of each reference honestly. If a document is a flexible framework rather than a mandatory code, explain its relevance to the activity and the supported significance of any departure. Acknowledge participant conduct and contrary evidence without predicting how jurors will reward or punish the expert.

Both sides, equally

I have been retained by plaintiffs and by defendants in these cases, and the analysis is identical either way: what does the evidence show, against what standard? Working both sides is not a marketing line; it is a methodological discipline. Experience on both sides can identify questions to test, but each theory requires examination against the record. I am not paid for my opinion. I am paid for my time, and the opinion goes where the evidence goes. Attorneys should demand that posture from every expert they retain, and examine the methods and evidence supporting each opinion.

What the expert actually delivers

• Triage: an early, honest read on whether the case exists and which pattern it fits.
• Investigation design: the inspection protocol, the document demands, the deposition questions.
• The standard of care: identification of the governing standards, practices, and manufacturer instructions, and an honest statement of their force.
• Causation in plain English: the chain from deviation to impact, told so a juror can retell it.
• Demonstratives: diagrams, photographs, measurements and physical exhibits tied to the record. A side-view drawing can show the relationship between wall overhang, fall path and measured padding depth. Identify the assumptions behind the illustration.
• Survival under cross: opinions framed conditionally where the record is open, stated absolutely where it is closed, and defended without flinching either way.

Building the Plaintiff Case

Address the defenses supported by the pleadings and evidence, including assumption of risk, comparative fault, waiver, compliance and disputed causation. For the plaintiff theory, identify the applicable duty, alleged departure, feasible control and connection to the injury.

Distinguish inherent risk from the alleged added hazard

Analyze waivers, assumption of risk and comparative fault separately under the governing law. Identify the actual risk and the alleged added hazard, such as deficient padding or an obstructed landing path. A technical distinction informs those defenses but does not itself determine a waiver's scope, enforceability or the participant's share of fault.

Review the waiver's wording, activities covered, execution and signer's authority. The reported guided ice climbing ruling allowed claims to proceed because the court found ambiguity. Do not extend that disposition into a rule for other waivers. Determine the jurisdiction's treatment of gross negligence and the evidence needed to establish it.

The standard of care anticipated your client's mistake

Investigate participant error without assuming it excludes an operator's contribution. Identify relevant industry guidance, available controls, the operator's notice and the control's suitability for the actual hazard. Establish cost and feasibility from records. Foreseeability does not erase comparative fault or establish that a particular precaution would have prevented the injury.

Engineered solutions versus instructions

Compare elimination or engineering controls with guards, procedures and warnings. For a rider instruction, determine what action was required, whether the rider could perform it and what other safeguards existed. Evaluate whether an alternative was feasible and would have addressed the mechanism. The instruction alone is not an admission that the operator knowingly left a hazard unguarded.

Investigate alleged concealment and knowledge

Investigate coverings, repairs and warning changes that allegedly concealed a hazard. Establish who acted, when, what the person knew and whether the change affected visibility or exposure. Compare that account with maintenance explanations. Counsel should assess any effect on waivers, gross negligence or punitive damages under the governing law.

Use the defendant's own paper

Obtain the operator's own material. The employee handbook that contains no flooring maintenance procedure at all. The orientation outline that never mentions the system that failed. The Long Island City location that uses proper foam matting while the Dumbo location chose loose mulch: the defendant's own sister facility proving the safer alternative was known, available, and in use within the same company. The insurance application that describes one activity while the marketing sells another. Build the deviation case out of documents the defendant wrote, and establish their authorship, context, applicability and consistency with actual practice.

Tell causation as a chain with one missing link

Connect the alleged departure to the injury through supported physical steps. For a flooring opinion, identify the installed product's requirements, depth at the incident landing point, fall dynamics and attenuation evidence. Evaluate whether maintenance or another proposed control would have changed the injury mechanism. Do not infer prevention solely from a shallow measurement or inexpensive remedy.

Building the Defense Case

A good defense in this field is not the mirror image of the plaintiff case; it is the same analysis run honestly. Evidence of compliance must be considered alongside the actual mechanism, the adequacy of the controls and other pleaded theories. When I take a defense case, my first task is the same as in a plaintiff case: find out what really happened. Sometimes what really happened is that the operator did it right.

Defend with the program, not with adjectives

Produce orientation and competency records, device-specific inspection logs, maintenance records and staff training documentation. Compare the records with physical evidence and testimony about actual work. A complete file does not establish that the program addressed the hazard or that staff followed it; gaps require investigation rather than a predicted jury response.

Inherent risk, honestly applied

Assess assumption of risk under the governing law and supported mechanism. Compliant padding, route design and instruction are relevant but do not alone establish an absence of negligence. If the participant used a wrong attachment point, examine instruction, verification, equipment design and the causal role of that conduct before allocating responsibility.

Reconstruct the mechanism before you accept the plaintiff's version

The plaintiff's account of the final two seconds deserves the same scrutiny in defense that the operator's logs get in plaintiff work. Fall dynamics are physics, and physics is checkable. Impact location, injury pattern, drop height, and body orientation must agree with the story. I have served as a defense expert in a recreational climbing brain injury case where exactly this reconstruction work mattered. Sometimes the reconstruction shows a deliberate jump rather than a system failure, a participant who ignored direct instruction, or an injury geometry inconsistent with the alleged mechanism. Report supported and unsupported mechanisms promptly. Counsel should assess trial and settlement using the complete liability, damages, cost and coverage record.

Comparative fault with discipline

Where the participant's conduct genuinely contributed, build it factually, not rhetorically: what the participant was told, what she acknowledged, what she did anyway. The defense version of candor is conceding the operator's imperfections that did not cause the injury, then isolating the causal conduct that belongs to the participant. An expert who blames the customer for everything is as useless to a defendant as an expert who excuses the customer of everything is to a plaintiff.

For operators reading this before the accident

Operate and document the safety program before an incident. Document every orientation. Log every inspection. Follow the manufacturer's service intervals to the day. Rake the floor and write it down. Fix the deck edge instead of carpeting it. If records are missing, investigate what work occurred and what other evidence remains.

Strategies for Winning

Use the following five tasks to organize the analysis and presentation. None replaces proof of duty, breach, causation, damages or a supported defense.

1. Identify the supported failure mechanisms

Identify each supported departure and its causal role. Organize the evidence clearly, but do not demote independent causes to mere corroboration of a preferred theory. Explain how the proposed mechanisms interact and where the evidence cannot distinguish them.

2. Explain causation so a juror can retell it

The test for every causation opinion is whether a juror could repeat it accurately to a spouse over dinner. The higher you climb, the less padding is under you. The carpet hid the curb; it did not remove it. She sat back because that is what the system trains every climber to do. If the sentence needs a diagram, build the diagram; if it needs jargon, it is not finished.

3. Connect conduct to accepted standards

Anchor opinions to relevant standards, manufacturer instructions, records and physical evidence. Distinguish a mandatory provision from a flexible practice. Establish applicability, feasibility and causal relevance without calling a practice universal or promising that a particular framing will survive cross-examination.

4. Build visuals jurors remember

Use scale drawings, measured surface profiles, preserved components, photographs and supported time-and-distance analyses to explain physical relationships. State what each exhibit establishes and its limitations. An inclinometer records slope at inspection; it does not establish that a floor was never raked.

5. Stand firm under cross-examination

Prepare to explain a reference's legal force, the expert's methods and independence, and the participant's contribution. Support each answer with the record, including contrary evidence. Measurements require interpretation and remain open to questions about method, timing and relevance.

The Reference Library

The standard of care in vertical recreation is written down. It lives in published industry standards, manufacturer instructions, engineering test methods, and the technical literature of climbing and rigging itself. Below is the working library I consult in these cases, organized by what each source actually proves. Counsel should obtain the editions in force on the date of loss; standards evolve, and the governing version is the one the operator had notice of at the time.

Case Files from the Field

Eleven climbing, ropes course, and zipline matters, worked for plaintiffs and for defendants, in courtrooms from Honolulu to New York City. Each one taught something the next case used. Identifying details are limited to the public record and to what the captions themselves disclose.

Theatrical and performance rigging

The recreation matters above sit alongside a parallel rigging practice in the entertainment world, where the same hardware carries scenery, lighting, and performers over the heads of casts and audiences.

Experience in theatrical and recreational rigging helps identify technical questions about shared components. Each new matter still requires examination of its actual system, records and competing explanations.

Steve Wolf

I have spent fifty-two years climbing and more than three decades rigging live human loads for a living. I have personally built, operated, inspected, and litigated every type of system this book covers.

I have climbed in the United States, Switzerland, and South America, worked as a professional guide and safety advisor, and serve as an American Sport Climbing Federation Certified Judge, First Class, and a member of the International Association of Climbing Judges. I am a member of the Association for Challenge Course Technology. I have built and operated challenge courses for clients including Nike, Google, MTV, and the New York City Department of Parks and Recreation, and I founded and own Stunt Ranch, a recreational park operating three challenge courses. I have built and operated private, industrial, and commercial ziplines, hold a world record for the longest tandem zipline, and have published on zipline and rigging safety. My technical rope and rescue experience includes work with police, fire, and emergency medical services, and I hold certifications in rigging risk analysis and mitigation, aerial rope and rigging rescue, and search and rescue.

As a professional stunt and special effects coordinator on more than seventy-seven feature films and hundreds of television productions for Disney, Warner Brothers, Paramount, Universal, and the major networks, my daily work for over thirty years has been assessing intrinsically dangerous activities and reducing hazards through design, procedure, training, and risk communication. I served as the lead investigator and expert in the matter of Spider-Man on Broadway. I am a graduate of Columbia University, hold seventeen professional certifications including Federal Emergency Management Agency credentials, and have hosted investigative science and engineering programs for the Discovery Channel, History, and other networks.

As an expert witness I have been retained in eleven climbing, ropes course, and zipline matters, for plaintiffs and defendants in roughly equal measure, alongside a national practice in firearms, pyrotechnics, fire, stunts, and on-set safety. I do not make a living as an expert witness, and my compensation never depends on my conclusions. I tell every jury the same thing: I am not paid for my opinion; I am paid for my time.

I am the author of the Wolf Safety Series, including Practice Safe Sets, Firearms Safety On Set, Deadly Hospital Mistakes, The Secret Science Behind Movie Stunts and Special Effects, and A Day in the Life of a Stunt Person, and I host The Fire Break podcast.