Its not really stupid people doing it. They can get anywhere as fast as a car can downtown. Probably faster. Takes great skill do this effectively. Wish I could.
I have a fairly large disadvantage when it comes to free running. It's called 6'3" and 230 LBS. Luckily, It's mostly muscle, and I'm good at taking long drops
Not too long ago, A bunch of people got in trouble for climbing up the walls in the stairwell. Funny thing is, nobody but students saw them do it at school, and no one told on 'em. The VP saw videos of them doing it (at school) on youtube
a couple aquaintances from england sent me this vid of their clan, the music is kind of annoying, but the stunts are pretty cool
the armitage brothers are the two who do the backflip over each other near the begining
I'd love to but I'm going to wait until I'm 18 at least to start. I've been advised from the Parkour forums to put it off until fully grown so that the rigor put on the body doesn't permanently affect skeletal structure and stuff.