I used to climb while in the military, lead climb classes, instruct, ice, free climb (not so much). I've seen people bounce. I really don't understand the challenge but people love the sport. I like hiking type climbing...such as only needing your hands occasionally. But dangling by a chalk or by your fist jammed into a crack never was fun for me. Laying on ice all day isn't fun for me either.
Removed link so others aren't sickened. But remember, death happens, make sure it doesn't happen to you too early.