A thrill ride took a terrifying turn when a child slipped out of his harness and fell to the floor. The accident happened on Sept. 1 at Urban Air Trampoline and Adventure Park in Lakeland. Investigators say this time the harness was not properly secured. The report states the child’s leg straps were not buckled, leaving him holding on with his arms until he lost his grip The child’s family has filed a lawsuit, alleging the accident was the result of operator error. According to the lawsuit filed in Polk County, the family claims the child fell "more than 20 feet" and suffered "significant injuries."