french ninjas :P

noun - Free running the sport or activity of running through urban areas while performing various gymnastic manoeuvres over or on man-made obstacles such as walls and buildings - from French parcour , used by the creators of the activity to mean `obstacle course'] http://dictionary.reference.com/browse/parkour

n. 来自于法语parcour,中文译为跑酷,又为暴酷、城市疾走、位移的艺术,是一项街头疾走极限运动,它没有既定规则,运动者将各种日常设施当作障碍物或辅助,在其间跑跳穿行。

In Casino Royale (James Bond film), the "chase" in the beginning of the movie, that chase displays parkour. That character who is bouncing all over that place, he is a parkour and free running expert (I can't remember his name though).

I suggest you to search for “David Belle”. He's the Parkour's founder.