I didn’t know that parkour was so popular until I saw the video above. This is a short definition from Wikipedia:
Parkour (sometimes abbreviated to PK) or l’art du déplacement (English: the art of displacement) is recreational activity 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.
Astonishing eh? Now my traceurs, summon your spidery powers and displace yourselves!