Parkour! Park-what now?

I had my first experience of Parkour at the weekened, all I can is, it was a lot of fun, and something I'm gonna take up. The guys I met that showed me the basics, were dead sound and very welcoming. For those of you who don't know what Parkour is, you get a bitch slap, but according to the wonderful wikipedia, parkour is ''an activity with the aim of moving from one point to another as efficiently and quickly as possible, using principally the abilities of the human body.''