 Whichever of the two players gave the best effort would go back to the circle, while the player "dogging it" would stay in until Kush decided he could quit.Former NFL and Arizona State player Curley Culp once broke a teammate's facemask during this drill.Another of his drills (which was designed to see if his running backs could take punishment carrying the ball) consisted of having only a center, quarterback, and two running backs line up on offense, with no other offensive lineman, and run running plays against the entire defense.