Its called parkour, or free running or free jumping, but parkour. That boys not bad, we used to do it years ago, some of my friends still do, I don't, due to being a lazy fatso, mostly because I'm too out of shape. It's really an urban thing, so many places in the city it can be practiced. I know of a gym where they practice moves and setup jumps. Over this side of the pond its been going for years, its still a bit of an underground thing, not widely publicised.
Its a great feeling when you do it, like any sport.
Chips