“His feet hit the mat, and almost instantly his knees buckled down, and he just let out the worst scream that you could ever have heard from a child.” That is how Kaitlin “Kati” Hill described the moment her three-year-old son Colton’s femur was shattered at a trampoline park. Her warning, shared a quarter of a million times on social media, echoed the same five words we hear from families in City of Grapevine every month: “We had no idea.”
At the Urban Air Adventure Park or the Altitude Trampoline Park near City of Grapevine, the courts look like a supervised, safe environment for a birthday party or a Saturday afternoon. But behind the neon lights is a system designed to maximize throughput and minimize legal accountability. We represent families in City of Grapevine who have lived the nightmare Kati Hill described. We know that when a child is launched by a 200-pound adult in a double-bounce or falls thirty feet from a climbing wall because a harness wasn’t attached, it isn’t an accident. It’s a business decision.
We have spent over 25 years making corporate defendants pay for prioritizing margin over human life. Ralph Manginello brings federal court experience and a track record of multi-million dollar settlements in catastrophic injury cases. Our team includes Lupe Peña, an attorney who used to defend insurance companies and recreational facilities. He knows their playbook because he helped write it. He knows which waiver clauses are airtight and which ones are full of holes under Texas law.
When your child is in a trauma bay at Cook Children’s in Fort Worth or Children’s Medical Center Dallas, the park’s risk management team is already working. They are counting on you believing that the paper you signed at the kiosk ended your case. It didn’t. In Harris County, a jury awarded $11.485 million against Cosmic Jump even though a waiver was signed, because we proved gross negligence. Whether you were hurt at a park off Highway 114 or in a backyard in a City of Grapevine neighborhood, you need a firm that understands the physics of the rebound and the loopholes in the release. Call us at 1-888-ATTY-911. The case starts today.
What Happened: The Physics of a Trampoline Injury in City of Grapevine
Most people in City of Grapevine look at a trampoline as a toy. The American Academy of Pediatrics (AAP) has looked at them as a medical hazard since 1999. A trampoline is an energy-storage device. It takes the kinetic energy of a jumper and stores it as elastic potential energy in the bed and springs, then returns it with interest. When that energy is controlled, it’s recreation. When it is not, it becomes a catapult.
The most common mechanism we see in City of Grapevine trampoline park cases is the double-bounce. This happens when two people jump on the same bed or interconnected beds. If a 200-pound adult lands just as a 60-pound child is beginning their upward push, the stored energy of the adult’s landing transfers into the child’s launch. The physics aren’t subtle: the child can be launched with up to four times their original force. The results are often comminuted fractures of the tibia or fibula—bones shattered into multiple pieces that require open reduction internal fixation (ORIF) surgery.
We also see catastrophic injuries in City of Grapevine from foam pits. Parents think of foam pits as “soft.” We know they are often “bottomless” or compacted. ASTM F2970 is the safety standard the trampoline industry wrote for itself. It requires specific foam pit depths and maintenance cadences. When those blocks aren’t rotated or replaced, they lose their deceleration capacity. A child diving head-first and striking the concrete subfloor beneath a City of Grapevine foam pit faces SCIWORA—Spinal Cord Injury Without Radiographic Abnormality. This is a pediatric phenomenon where the spinal cord is stretched or infarcted even when the bones appear normal on an initial CT scan.
Our firm is uniquely positioned to handle these complex medical cases. We currently litigate a $10 million lawsuit against the University of Houston involving rhabdomyolysis and acute kidney failure. This is the same pathology seen in “extended-jumping” cases at parks in City of Grapevine where children jump for 90 to 120 minutes in a hot indoor environment without adequate hydration. When muscle tissue breaks down and releases myoglobin into the blood, the kidneys can shut down within 48 hours. We know the experts, we know the science, and we know how to document the myoglobin cascade to hold institutional defendants accountable.
Who Is Responsible for Your Injury in City of Grapevine?
Identifying the defendant in a City of Grapevine trampoline case is like performing corporate archaeology. If your child was hurt at a chain like Sky Zone, Urban Air, or DEFY, there isn’t just one company to sue. There is a layered stack designed to hide the money.
We start with the Operator LLC—the local entity that signed the lease in City of Grapevine. They are often undercapitalized, carrying only a $1 million primary insurance policy. Above them is the Franchisee, which may own multiple locations across North Texas. Then there is the Franchisor, like Sky Zone Franchising LLC or UATP Management LLC (the Urban Air franchisor).
The franchisor usually argues they aren’t liable because they only “license the brand.” We point to the 2023 Damion Collins arbitration award of $15.6 million against Urban Air. In that case, the arbitrator found a “systemic failure” by the franchisor and allocated 40% of the fault to UATP Management LLC. In City of Grapevine, we look for “apparent agency.” Does the park use the franchisor’s uniforms, signage, and safety videos? Does the franchisor mandate the training that we prove was inadequate? In Texas, the Sampson doctrine allows us to pull the franchisor into the case if a reasonable parent in City of Grapevine believed they were dealing with the national brand.
Beyond the chains, we look at the private equity sponsors. Sky Zone, Inc. (formerly CircusTrix) is backed by Palladium Equity Partners. Urban Air’s parent, Unleashed Brands, was acquired by Seidler Equity Partners in February 2023. These firms make the high-level decisions to cut attendant ratios or defer equipment maintenance to hit profit targets. They hire the same corporate defense firms we beat when we litigated the BP Texas City refinery explosion. We aren’t intimidated by a Fortune 500 legal team. We’ve already won that fight.
If the park’s equipment failed—a torn mat, a broken spring, or a failed harness on a City of Grapevine climbing wall—we also pursue the manufacturer. Companies like Jumpking, Skywalker, and UA Attractions LLC (an Urban Air-related entity) bear strict product liability for design and manufacturing defects. Our discovery protocol includes pulling the FMEA (Failure Mode and Effects Analysis) and prior similar claims database to prove they knew the product was failing but kept it on the floor.
The Waiver You Signed in City of Grapevine: Why It Doesn’t End Your Case
The insurance adjuster will call you within 48 hours of your child’s City of Grapevine injury. They will be “friendly.” They will ask to “walk through what happened” as a recorded statement. And they will repeatedly remind you that you signed a waiver at the kiosk. Their goal is to make you give up before you realize the waiver is often unenforceable.
Texas follows the “Fair Notice” doctrine established in Dresser Industries v. Page Petroleum. A waiver that releases a park from its own future negligence must be conspicuous—the text must be bold, larger, or set apart—and it must satisfy the “express negligence” rule. If the word “negligence” isn’t clear and prominent, the waiver may be void on its face. Furthermore, Texas courts have held in Munoz v. II Jaz Inc. that a parent generally cannot sign away a minor child’s independent legal rights to sue for personal injuries. Your signature might bar your own claims for medical bills, but it does not stop your child’s claim for their pain, suffering, and physical impairment.
There is also the “Gross Negligence” exception. No piece of paper in City of Grapevine can release a defendant from reckless or willful misconduct. If a park manager knew a trampoline slide was torn but didn’t close it, or if they were warned three times about a compacted foam pit and did nothing, that is gross negligence. That is how we secured an $11.485 million verdict in Harris County despite a signed waiver.
If your family’s primary language is Spanish and the City of Grapevine park presented you with an English-only waiver, we invoke the Delfingen doctrine. Texas courts have refused to enforce agreements where there was a language barrier and no translation was offered. Lupe Peña is a native Spanish speaker who handles these cases directly, ensuring that a language gap doesn’t become a loophole for a negligent park. Hablamos Español. Llame al 1-888-ATTY-911.
Catastrophic Pediatric Injuries: Beyond the Emergency Room
A trampoline injury in City of Grapevine isn’t just one bad day; for a child, it can be a decade of medical monitoring. We focus on “Medical Specificity” because that is how you win the maximum life-care recovery.
A “broken leg” is often a Salter-Harris Type II fracture of the distal tibia. Because a child’s growth plates (physes) are made of cartilage, they are the weakest part of the skeletal system. If the fracture is not treated by a specialist who understands pediatric biomechanics, the bone may stop growing or grow at an angle. A child injured at a City of Grapevine park at age seven may not show a visible limb-length discrepancy until age thirteen. By then, the trampoline park’s insurer hopes you’ve long since settled. We don’t settle until we’ve projected the lifetime cost of corrective osteotomy and physical therapy.
Traumatic Brain Injuries (TBI) in City of Grapevine are equally complex. A Developing Brain TBI can result in academic regression months after the “concussion” has seemingly healed. We work with pediatric neuropsychologists to establish a cognitive baseline and project the future special education costs—which can range from $500,000 to $3 million over a child’s educational life. We also monitor for Second-Impact Syndrome. Many City of Grapevine parks don’t have a concussion protocol; they let a child who “bumped their head” keep jumping. A second blow to a concussed brain can cause catastrophic cerebral edema. This is a clear case of gross negligence.
In the most severe cases—cervical spinal cord injuries leading to paralysis—the life care plan is the case. A child with C4 quadriplegia from a foam pit landing requires a 60-year forecast including ventilator care, modified vehicles, Rollins showers, and 24-hour attendant care. These plans routinely exceed $20 million. We build these cases from day one so that when we sit down with the insurance company, they know they are not dealing with a “slip and fall” lawyer. They are dealing with a firm that knows the medicine as well as they do.
Evidence Preservation in City of Grapevine: The 30-Day Clock
Evidence in a City of Grapevine trampoline case is engineered to vanish. The most critical piece of proof—the multi-angle surveillance video—is typically overwritten on a 7 to 30-day loop. If you wait for the park to “do the right thing,” the footage of the attendant being on his phone while your child was double-bounced will be gone forever.
The moment we are retained, we send a formal spoliation letter via certified mail and email to the park’s owner, the franchisor, and their general counsel. We demand the preservation of:
- Every camera angle from the Facility for the 72 hours surrounding the injury.
- The original handwritten incident report before it was “finalized” (sanitized) by risk management.
- The kiosk waiver database metadata, including the IP address and exact timestamp of the signature.
- The court monitor shift logs and time-clock records to prove the park was operating below ASTM F2970 staffing ratios.
- The daily pre-opening inspection logs for the 30 days preceding the incident.
When video “glitches” occur—like in the Mathew Knight case in Georgia where all four cameras failed at the exact moment of the injury—we pursue adverse inference instructions. We tell the jury that the park destroyed the evidence because it proved their guilt. Our paralegal team also performs a “Wayback Machine” crawl of the park’s website to capture safety claims and marketing videos that encourage stunts, which the park often deletes after a lawsuit is filed. We use digital forensic tools like Cellebrite and Magnet AXIOM to interrogate DVR systems and kiosk databases. In City of Grapevine, we don’t just gather evidence; we secure it.
Why City of Grapevine Families Choose Attorney911
When you are looking for a law firm after a trampoline injury in City of Grapevine, you will find hundreds of “personal injury” websites. Most of them have never read ASTM F2970. Most of them don’t know that Urban Air’s “Sky Rider” has a chain-wide history of strangulation pattern. Most of them are afraid to sue a franchisor.
We are different. We have:
- Insider Defense Knowledge: Lupe Peña knows exactly how insurance companies value these claims because he used to represent them. He knows their “friendly adjuster” scripts and their “Med-Pay” traps.
- Fortune 500 Experience: Ralph Manginello is battle-tested against multi-national corporations. The parent companies and private equity sponsors behind City of Grapevine’s parks don’t scare us.
- Medical Depth: Our work on rhabdomyolysis and acute kidney failure in the University of Houston case gives us a level of medical litigation sophistication that most generalist firms lack.
- No Barriers to Entry: We work on a contingency fee. You pay nothing upfront. We advance every cost—the biomechanical engineer, the pediatric orthopedic consultant, the ASTM safety expert. If we don’t win, you don’t owe us a dime.
- Local Roots, National Reach: We are a Texas firm with offices in Houston, Austin, and Beaumont. We understand the Tarrant County jury pool and the City of Grapevine demographic. Our knowledge doesn’t stop at the state line, but our presence is felt right here in North Texas.
As Chad Harris, one of our clients, said: “You are NOT just some client… You are FAMILY to them.” We treat your child’s recovery as our own priority. We don’t just move cases; we move the standard of safety for the whole industry.
Frequently Asked Questions for City of Grapevine Parents
Can I sue if I signed the electronic waiver at the City of Grapevine park?
Yes. Texas law requires waivers to meet specific standards of conspicuousness and “fair notice.” If the release was buried in a click-through flow or didn’t use the word “negligence” correctly, it can be voided. More importantly, in Texas, parents generally cannot waive the personal injury claims of their minor children. The waiver might stop you from suing for the medical bills you paid, but it doesn’t stop your child from recovering for their own permanent injury.
What should I do if the City of Grapevine park manager told me it was a “freak accident”?
“Freak accident” is the industry’s euphemism for “we violated a safety standard but hope you won’t check.” We look at the ASTM F2970 logs. Was the attendant trained? Was the foam pit deep enough? Was the age-separation rule enforced? What they call an accident, we usually find is a documented violation of the industry’s own safety floor.
How much is my child’s trampoline injury case worth in Tarrant County?
The value depends on the permanent impact on your child’s life. A simple fracture might settle for $50,000 to $200,000. However, a Salter-Harris growth plate injury requiring monitoring through age 18 can be worth $500,000 to $2 million. Catastrophic brain or spinal cord injuries consistently reach $5 million to $15 million in national trampoline verdicts. We calculate damages based on a 70-year life care plan, not just the initial hospital bill.
Is the Urban Air franchisor in Bedford/Grapevine liable for my local park injury?
Often, yes. Through theories of apparent agency and retained control, we reach the franchisor and parent entities. Franchisors like UATP Management LLC often dictate the exact training and layout of the park. If their “systemic failure” produced the injury, as it did in the Collins case, they are on the hook.
How do I tell if my child has rhabdomyolysis after jumping at a City of Grapevine park?
Look for “cola-colored” or dark brown urine, extreme listlessness, and muscle pain that makes them cry 24-48 hours after they jump. If these appear, go to the pediatric ER at Cook Children’s or Children’s Dallas immediately and demand a Creatine Kinase (CK) test. This is a medical emergency that can lead to kidney failure. Once the medical emergency is stable, call us. We know how to litigate these complex biochemical injury cases.
What if my child was injured at a birthday party held by another family in City of Grapevine?
This actually creates a major legal gap for us to exploit. If you weren’t the one who signed the master party contract, or if the host parent signed for your child, notice of the waiver’s terms is in question. A signature by someone who is not a legal guardian does not bind your child. This is a prime example of the “Signer-Authority Defeat” tactic we use to destroy the park’s defense.
The Kill-Shot: Acting Now to Protect Your Child’s Future
What happened to your child at City of Grapevine wasn’t an accident. It was the output of a system that put margin ahead of safety. The AAP has been warning about this since 1999. The industry wrote ASTM F2970 to create a safety floor—then they chose to operate through it. The waiver was drafted to make you go away. The surveillance was engineered to overwrite before you gathered your thoughts.
Attorney911 was built for this fight. Ralph Manginello brings 25+ years of catastrophic injury experience. Lupe Peña brings the insider’s view of the insurance defensive line. We know the 2025 jurisdictional split, and we know exactly how many millions a Tarrant County jury is willing to award when a child is hurt because a park chose profit over protection.
Your child’s case is decided by what we preserve this week. DVRs overwrite in days. Incident reports get “revised” in hours. Our spoliation letter goes out within 24 hours of your call. The case starts now.
Call 1-888-ATTY-911. Hablamos Español. No fee unless we win. We advance every expense—from the biomechanical engineer to the life-care planner. Your child’s recovery fund stays untouched. Let us hold them accountable.
