From Wikipedia :

(Le) Parkour (English: the art of movement) is a physical art of French origin, the aim of which is to move from point A to point B as efficiently and quickly as possible, using principally the abilities of the human body. It is meant to help one overcome obstacles, which can be anything in the surrounding environment � from branches and rocks to rails and concrete walls � so parkour can be practiced in both rural and urban areas.

Arrow First off a Latvian group Dvinsk Clan showing off their skills.

Arrow Next in line is the talented parkour artist, stuntsman and martial artist Cyril Raffaelli.
Arrow And finally the founder of the art - David Belle himself.