In Spaceball, players jump around in individual areas — both floor and walls — of a trampoline, and try to throw the ball past their opponent through a netted tunnel to the other side, all while bouncing up and down. Lauded by former astronaut Scott Carpenter as "the best conditioning exercise for space travel," the game's trampoline features a galvanized steel frame for minimal corrosion, a sturdy, polypropylene treated playing surface, and support for two players of up to 200 lbs. each.