So the punter scrambles to his right and just before he crosses the LOS, he (a) throws a legal forward pass, (b) fumbles the ball, (c) pitches backward to A5, (d) punts that ball. When would you blow the whistle and where would you spot the ball? And how do you explain why you did what you did to a coach who doesn't have a complete grasp of what happened? Too many complexities in my opinion.