I actually got started in 2nd and 3rd grade recesses in my old school in Mexico. Games like tag were very common, and so I was always trying to figure out how to get the drop on pursuers. Stuff like figuring out how to get up that ledge without banging my knee over it or jumping from slide to monkey bars over people chasing me. I only stopped moving around like that becuase middle school in the USA usually does away with recess. I got back to highschool, and I resumed running, jumping and climbing, and even figured out a way to get onto the school roof, although I was into skateboarding. Finally, winter of 9th grade, a friend was all like "dude, check this out. It's like skateboarding, but without the board." He showed me the Russian Ninja video. I wasn't too impressed, actually, but I decided I would look farther into it, found the Urban Freeflow site, and took a look at their vaulting tutorials. I learned that and wall runs, but was kind of still a skateboarder until I started joining training sessions with the people at overflux and they showed me how to train, and here I am. After that, skateboarding kind of faded out and parkour just flowed in. It was very subtle. I can't remember a time when I wasn't doing parkour, and yet I can't remember a time when I was. It's all just... there, it's really weird.