A player crosses the center line and touches an opponent. A player holds the ball. The ball is thrown or pushed by a player. The ball is hit through the spectator's window. An illegal block is attempted.
Players purposely distract the opponents.
A player illegally assists a teammate. A block does not count as one of the three contacts allowed a team. If the ball is blocked by a male player, another male player may hit the ball back into the opponent's court.