Bored, athletic former Soviet gymnasts apparently invented a sport called Freerunning that first made moves like this popular.
It got a lot of interest online, and has been featured in a number of movies (bad guys doing it in the mall in Paul Blart: Mall Cop being the first that comes to my mind).
If the definition of athleticism is a summation of flexibility, speed, strength, power and coordination - then these guys could possibly rank as some of the best athletes on earth.
[ame="http://www.youtube.com/watch?v=3KSr1pozm6Y"]YouTube - free running[/ame]