How to people learn to climb and jump on a buidilng and climb and jump back up without fear or failure

Practice..using ropes.

Are you talking about parkour? l think you start small and work your way up to more ambitious stuff. Like most everything in life.

Are you talking about that crazy urban running/jumping/climbing/flipping thing that is pretty popular in London? l would say start small, do not try something outside your limits, and try to hook up with a well established group that is willing to help you learn.

that was on the tv today.
you can go to clubs where they teach you to do all that james bond stuff using mats and everything.
its urban freestyle or something like that:P

parkour is what l think your talking about. practice is huge, when you have confidence it helps erase fear, but some people are just crazy and do not have fear of heights, death, or injury. So they have no problem doing the moves, also some people just deal with fear better than others.