There is nothing more satisfying and humbling than watching someone with far more rage than you possess channeling that rage into something far more amazing than you could ever accomplish. This is the experience of watching Murderball (aka "quad rugby")—sport of furiously athletic wheelchair users, subject of the fantastic 2005 documentary of the same name, and reason for a tournament hosted by the Seattle Slam wheelchair rugby team this weekend. The winners of the tournament, held for the first time ever in Seattle, will go on to national competition. Go. (Seattle University's Connolly Center, 550 14th Ave. See www.seattleslam.org for schedule, free. March 13–15.)