I don't know the right way, but a former acquaintance jumped off this bridge into the water, 100' below. Somehow he lived, but he had bruises all over his body. As I recall, he said that he did cross his arms and legs, and did wear shoes. I didn't think to ask him if he got an enema from it.
http://en.wikipedia.org/wiki/Pennybacker_Bridge

He was prompted to jump after learning that someone died jumping from it.