Street Trials/Parkour on a Bike

My friend Sarah sent me this video, describing it as "parkour on a bike", which is about as good a description as someone could give to trials riding, I'd say. Of course this assumes you know what parkour is. You may have gotten a sense of it from the video on brachiation, but it is really about moving through a space quickly and efficiently. Like we try to do with our workouts in crossfit - move quickly and efficiently. Anyway, if you've not seen parkour before, or if you want to see more, the second video is a good example of pretty pure parkour (without the flips and tricks of freerunning)