I walked onto the quad of Bella Vista High School on a Sunday afternoon to a sight of 20 or so men climbing walls, running like cheetahs on all fours and swinging from trees. This was the Sacramento regional parkour practice, led by a SFparkour.com representative, Victor Lo Forte. He has been a practitioner of parkour, or traceur, French for tracer, for three and a half years and has led the Sacramento group for about two years. "From what I understand, it's basically the discipline of training one's mind and body to prepare oneself to overcome obstacles in an environment," Lo Forte said. Parkour is said to be rooted in early 20th century French military practices. Georges Hébert, a Wor