Parkour

From wikipedia:

Parkour is a physical discipline inspired by human movement. It focuses on uninterrupted, efficient forward motion over, under, around and through obstacles (both human-made and natural) in one's environment. Such movement may involve running, jumping, climbing and more complex techniques. The goal of parkour is to adapt one's movement to any given obstacle in one's path.

[video link]

Be assured: The soundtrack is worth suffering through. A quick google-ing will find other entertaining examples of the sport.