This is just insane ! You, if you are young behind your computer tab or smartphone ! Don't do that please this is just too risky and dumb, you have only one life... I will never understand how they can't be afraid by the height. In this video you see a crazy guy who is on his hands on the top of a building, and he is on the edge ! he pump with his arms just not a good idea, when I watched it I was scared for him.