Wallyball
（重定向自Rebound volleyball）
Wallyball (known in some places as rebound volleyball) is a fast-paced sport that was created by Bill Dejonghe at the Calabasas Racquetball Club (Calabasas, California), in 1979. The game is volleyball played in a racquetball court, where it is legal to hit the ball off of the walls. The idea was an attempt to help bring more business into the club in the summer months. The club pro Joe Garcia then took Wallyball mainstream.