How Hawaii Law Looks at a Trampoline Injury Like Yours
Three legal theories usually frame a trampoline injury. If you were hurt because the jump floor, padding or surrounding area was not kept reasonably safe, the theory is premises liability, the duty a property owner or operator owes to people on the property. If the concern is how jumpers were watched, for example how many people shared a mat or how court monitors responded to risky play, the claim is negligent supervision. If a trampoline, mat, spring, padding or enclosure had a defect that caused the injury, the claim is product liability.
Each theory comes with its own proof. A negligence claim asks whether someone had a duty, breached it, and caused your injury and losses; a product claim asks whether there was a defect and whether it caused the harm. Whether any of these is met depends on what happened in your incident.
Hawaii adds two rules that shape all of this. The first is comparative fault, the idea that blame can be divided among the people involved, including the injured person. Under section 663-31 of the Hawaii Revised Statutes, "Contributory negligence shall not bar recovery" if that negligence "was not greater than the negligence of the person or in the case of more than one person, the aggregate negligence of such persons against whom recovery is sought," but damages "shall be diminished in proportion" to the injured person's share. If you worry that a flip or a crowded mat makes the accident your fault, this rule means partial fault alone does not end a claim. The court notes on that official page also record that Hawaii's courts found the "known or obvious danger defense" inconsistent with the legislative intent behind the statute.
The second is the recreational-use statute, a rule that limits a landowner's duty to people who use land for recreation. Section 520-4 of the Hawaii Revised Statutes applies to an owner of land who "invites or permits without charge any person to use the property for recreational purposes," except as section 520-5 recognizes or provides. Such an owner does not extend any assurance the premises are safe, does not give the person the legal status of an invitee or licensee owed a duty of care, and does not assume liability for injury caused by those persons' acts or omissions, or for injury to people who come onto the land in response to an injured recreational user. The words "without charge" matter: if you paid admission, your situation may be treated very differently from a free invitation, and whether the statute reaches a particular facility depends on the facts. An attorney can help sort out which of these rules a specific accident raises.