Fouls "away from the ball" (fouls that do not occur on the shooter or near the ball) are handled like the second case above in most situations. Many times defenders hold their opponent to prevent them from catching an in-bound pass or fight through screens and thus are called for fouls. These fouls are almost always treated as normal personal fouls. In the NBA, when there are only two minutes left on the clock of either half, off-ball fouls when the fouling team is over the limit are rewarded with one free throw and possession of the ball. It is therefore common for a losing team to deliberately single out its opponent's poor free throw shooters, regardless of their dominance in other aspects of the game (as in the cases of Ben Wallace and Shaquille O'Neal), as the targets of deliberate fouls until the two-minute mark, after which the losing team plays intense defense for the rest of the game; this strategy is known as the "Hack-a-Shaq". It is believed that this rule was instituted because of Wilt Chamberlain. Previously teams had been allowed to foul any player on the court regardless of whether that player had possession of the ball, with only two free throws awarded to the fouled player. This motivated teams to chase poor free throw shooters, such as Chamberlain, around the court in an attempt to foul him in an effort to extend the game. To discourage this practice, the NBA changed the rule to award one free throw and possession of the ball to a player who has fouled away from the ball in the last two minutes of the fourth quarter. This rule does not apply in international or NCAA play and in fact, plays a very vital strategic role in the NCAA Tournament.