Approximately 75% of injuries occur when more than one person is on the trampoline. The person weighing less is five times more likely to be injured.Children under six years old are particularly vulnerable to injury.Injuries can occur to all parts of the body, including the neck, arms, legs face and head. Head and neck injuries are the most serious injuries associated with trampolines.Adult supervision is no guarantee of safety. More than half of all trampoline accidents occur whilst under supervision. However a trained spotter can greatly reduce this risk.