This is an example of a Flagrant Foul, Penalty 1. A Flagrant Foul, Penalty 1 is defined as contact that is unnecessary. The defensive player on this play pushes his opponent unnecessarily in the back. This is a non-basketball play by the defensive player to a vulnerable player, and there is high potential for injury. The penalty for a Flagrant 1 is two free throws for the offended player, and his team would also retain possession of the ball. Note also that any called foul that could potentially be ruled flagrant will be reviewed via Instant Replay, to determine if it is a Flagrant 1, a Flagrant 2, a Technical Foul, or a common foul.