[JRutledge]

This concept basically means watch the defense so when and if contact occurs you are not surprised and you know if the defense did something illegal or not. Usually the block/charge is the reason this comes up often, but it also helps you know that other possible illegal activity is taking place. Often a player that wants to touch a dribbler does things with their arms long before they touch the player. So when contact occurs you can anticipate the action and not be caught totally off guard if you have a foul or if you do not have a foul.

Peace