The article discusses some lesser-known rules in the National Basketball Association (NBA) that may surprise many fans. The first rule is that a player who was fouled during a successful three-point shot only gets two free throws instead of three. Another surprising rule is that a player can receive a technical foul for "unnatural acts," such as touching the ball with his foot. Lastly, a team can challenge a foul call and the referees can review it using instant replay, similar to challenges in other sports.