Developed in France, Parkour is derived from gymnastics and other martial arts. Parkour focuses on self defense through tactical retreat. The art continues to grow because it is fun and also looks awesome.
the Art of Parkour [also known as Free Running is the art of running, bouncing, tumbling, leaping around pretty much every surface (horizontal or not) in your city]: here: bounding off building balconies!
TIPS TO STRONG WRISTS: Please excuse the non consistent blue shade of he photos. The white balance on my phone decided to mess with me. So strong wrists is part body structure, part "before I came to yoga" lifestyle but definitely still workable.