It's a mix of b-ball, football, lacrosse and trampolines. It is a revolutionary new action sport. In slamball, two teams of four players each try to get a ball into a basket while playing on a highly-modified, spring-loaded court. The court is enclosed with glass walls so the ball is always in play  and there are four trampolines set up around each net. These trampolines are used by the players to pull off high-flying slam dunks.