Buzz·Posted on 19 Jan 2014These Daredevils Hanging Off Tall Buildings Will Make You Feel A Bit SickA young man known only as "Mustang Wanted" leads an urban free climbing club in Eastern Europe, and the things they get up to are utterly terrifying.by Alan WhiteBuzzFeed News Reporter, UKFacebookPinterestTwitterMailLink Mr Mustang says you shouldn't copy his or his friends' antics. Tap to play GIF Tap to play GIF Which is sound advice, because they're trained professionals. Tap to play GIF Tap to play GIF And also, clearly have no sense of self-preservation whatsoever. Tap to play GIF Tap to play GIF There is no reason on earth to think this is a good idea. Tap to play GIF Tap to play GIF Why would you do this? Tap to play GIF Tap to play GIF WHY?? Tap to play GIF Tap to play GIF Channel Four will be broadcasting a documentary about the group at 9pm tonight. Watch video highlights here. View this video on YouTube youtube.com