Instead of tackling them, we should do our best to exert some mental pressure on the RB.

Maybe the defense can slowly form a circle around the RB and not give him any clear direction to run. Or maybe we'll just line up across the field red rover style and it will confuse the RB that he can't get past our line in the sand.

If not of that works, we'll just keep dropping back as he runs down field showing that we are going to defend that goal line at all costs. He'll definitely freak out before he gets there!