Parkour, or Free Running is a form of movement that looks like it should be done with wires, in fact it looks like it is done with wires, but isn’t. This stuff is amazing to watch. Check out these Russian free runners (or traceurs) going at it with some gusto (Thanks Ollie).
There’s also some great Parkour videos at Urban Freeflow that are definately worth checking out (warning: NSFW).
I can do that… No, really. Almost.
BTW, did you get my mail?