2-31-2 Note Diagram

2-31-2 Note The game official must rule whether the action illustrated results in a fumble or an incomplete pass. The game official is to make his judgement based upon the movement of the passer's arm at contact. If the arm is stationary or moving backward away from the line of scrimmage on contact (PlayPic A), the result is a fumble. If the arm is moving forward toward the line of scrimmage on contact (PlayPic B), the result is an incomplete pass.