I usually use a quarterback with at least decent speed, In order to execute this screen well, I usually scramble all the way over to the left of the field with my QB vision on my L1 reciever and at the last second before im either about to get sacked or go out of bounds i switch the vision to my o reciever and bullet the ball. There should only be one defender down there because most of the defenders came to the left of the field.