Found something!
Found something worthy of posting.
Parkours. Basically you just use the city as a jungle-gym and try and run through, over and around things as fast and as fluidly as possible. One of the reasons I think living in Britain would be really neat. It's also big in France and Germany I hear. Unfortunately not so much in Ottawa. It's a shame, since I would really like to learn how to be an urban ninja. That would just be cool.