National Geographic : 2011 Oct
NO ELBOWS, NO KNEES. Their "fight club" had rules. At least one Friday a month, boys gathered after school in the backyard of Bryan Campbell (at far left) to wrestle and box. Campbell's mother gave her OK as long as they kept it safe; a bloody nose was the worst injury suffered. The boys often used phones to film their contests, then posted the videos to a private group on Facebook, where more friends could admire their prowess. The rush of a headlock, a bond between friends---their fights delivered both excitement and social rewards.