Black 9 starts a drive to the basket and two defenders try to prevent the score, with defender White 24 jumping to try to block the shot. The referee calls a held ball resulting in a jump ball situation. Article 33.2 Each player has the right to occupy any position (cylinder) on the playing court not already occupied by an opponent. This principle protects the space on the floor which he occupies and the space above him when he jumps vertically within that space. As soon as the player leaves his vertical position (cylinder) and body contact occurs with an opponent who had already established his own vertical position (cylinder), the player who left his vertical position (cylinder) is responsible for the contact. Article 33.15 Pushing is illegal personal contact with any part of the body where a player forcibly moves or attempts to move an opponent with or without the ball. Outcome: Incorrect decision from the referees. Once that Black 9 had returned to the floor after the unsuccessful attempt to score, White 24 created an illegal contact against him by invading his cylinder from behind and a personal foul for pushing should have been called.