The thing is, the cornerback can play the screen so many...

The thing is, the cornerback can play the screen so many different ways. He can come up and try to beat you to the ball right away. He can head fake you. Or he can try to back off and get around you. You have to be ready for anything and you have to be able to move your feet so that you can react to what they're doing. Most of them, though, just try to run away from you.