It is a concept ,it exists.
From up there you could see everything. Distances , spaces , height and depth. Mathematical equations interpreted at that singular moment as on freaking beautiful world , there is only one left thing to do. . . . JuMp !
So what is fear then ? Most would say that fear is born out of the unknown, but perhaps there is an even greater fear that arises from what is known. All those things in your mind that impose limits and build walls , leading to the real insanity. The real thrill in taking any great leap is an open mind.