If you want to bungee jump from a high bridge then you should first create a human form for yourself, then tie a stretchable cord to your leg, and the bridge, and then jump off the bridge.  Make sure you calculate the distance to the ground, the length of the cord, and how long the cord will stretch to after a mass with your weight falls from the height of the bridge with the cord attached to it.  Failing to perform this calculation may result in the human form you created hitting the ground, and losing the memories you otherwise would have gained from bungee jumping.