This activity helps improve the side to side shuffling and staying balanced, ready to reverse movement. The defender must not overcommit to either ball as the dribbler can fake going to one ball and reverse dribble to the other. There should be at least 6-10 players per group as this is an extremely fatiguing activity, if early scores are not realized. Be sure to have different opponents. I've found this activity the best at teaching a no-reach defense.
Players begin to realize shots can be stopped without over committing.
He must be aware of what the defense is doing, and make appropriate decisions. If the defense is compressing the field towards ball, it may be too late for a forward pass. In that case, continuing to dribble or laying off a square or drop ball may be the best decision. If we are talking a full fledge trap, then the defense is keying on the man with the ball. Their 'step up' is timed to be just before the pass is made.