Have you heard of bungee jumping? To do a bungee jump, you dive or leap from a tall structure , such as a high bridge, with just a rubber rope tied round your ankles. when the rope stretches as far as it can go, it springs up, taking you along. Then you continue bouncing up and down with the rope until it stops moving and you are hanging upside-down..you may then be pulled up to the bridge or platform from which you jumped, or lowered to the ground. If there is a river under the bridge, you may be lowered to it and be picked up by a boat.