Pushing with the shoulders, hands, and arms is not permitted, however posting with the back is permitted. Pushing with the feet is permitted but only when standing in your own territory. Foot-checking is also permitted. Shooting a ball into the stands or against any fixed object is prohibited. This includes shots that go over the backboard with or without the use of a foul line extension. A player who violates these rules will be called for a foul. The referee will signal the foul by raising his hand above his head. If you are on court during a violation, you can report the incident by pointing to the sky with your hand. The referees will see this and know to call attention to it. There are three types of fouls: personal, flagrant, and defensive. A personal foul is committed by a player while he is involved in the game. For example, if a player hits another player with an elbow or knee, he has committed a personal foul. A flagrant foul is done deliberately to injure someone else's ability to play sports. For example, if a player kicks a ball at another player's head with the intent to hurt him, he has committed a flagrant foul.