Bungee jumping is an activity that involves jumping from a tall structure while connected to a large elastic cord. The tall structure is usually a fixed object, such as a building, bridge or crane; but it is also possible to jump from a movable object, such as a hot-air-balloon or helicopter, that has the ability to hover above the ground. The thrill comes as much from the free-falling as from the rebounds. There are many injuries that can happen from bungee jumping. It is a risk filled venture when jumping from such strange locations where you can relieve some of your liability by making participants sign a Bungee Jumping Waiver.