What is "schleuderball"

Schleuderball is a sport that originated in the Northwest Germany. It is played by two teams consisting of anywhere from two to eight players. The object of the game is to throw the ball into the opponents goal. The game is played on a field that is 100-meters long by 15-meters wide (in the United States yards may be substituted for meters). The Schleuderball itself is a 1.5 kilogram leather ball with an attached strap. The primary throw, called a schleuder, is performed by swinging the ball around by the strap, gaining centrifugal force, and releasing in the direction of the opponent's goal. A different type of throw, called a shock, can be thrown by the player who catches the opponent's schleuder. The two teams alternate schleuders back and forth until one team gets the ball to land in the opponent's goal.