Griffith, who goes by the street name "Wee Beastie," is the youngest-ever member of Parkour Generations, a London-based organization devoted to furthering the urban sport. He was accepted into the group last month as a trainee in the "Developing Athlete Programme," a mentoring gig that matches parkour prodigies with older, wiser and no doubt bruised-er free runners. Griffith, who sometimes wears a backpack to practice, is "an exceptional young man with real talent, passion and dedication to the discipline," writes Generations, "and we are sure he has a bright future on our mentoring programme and in parkour in general."