As umpire, I would huddle and assist, but I would never blow my whistle or throw my bean bag. You do not have a good view to determine if the ball crossed the goal line or not. If you have information to contribute, say something. Do not take it into the locker room to discuss later. I would go to him, and tell him that I saw the ball come loose after he was down, but I can not say if he reached the goal line or not.