parkour is the coolest thing since the skateboard, i used to get chased out of the Boston subways for doing that stuff. i'm a little old now but i can drive, film, and still run fast for short distance.................
Actually we are, some of us have become surgeons instead, which allows others to get away with acting like our cousins, sometimes.
Anyway, it sure is a great looking sport... lot's of technique and guts.
I would reckon that it takes some months of preparation first, like tuning up ones flexibility, learning how to attenuate chocks (falls) and so forth(?).