Our Crew has discussed this numerous times this season.  So I justthought I would throw it out to the board here. 
A  is running the ball and B is clearly  trying to"strip" the ball from A.  At  what point do you stop the play  if the runner is still making progress while B is content on trying to get the ball.  Additionally, As U I assume that  I would be looking for anything cheap in the  "scrum"  as well a possible turn over,  how would you  signal to the wingmen if a turnover had occurred and the defense is heading the other way, other than a bag, which  can be hard to see if the wingmen are trying to determine if progress had been stopped or not.
