So with the changes in the latest round of NFL rules and the way these rules tend to trickle down to all levels of the game, the new rule against an offensive ball carrier ducking his head while running with the ball against a defensive player, I am watching the John Riggins bio and watching some of his best runs and thinking there's a 15 yard penalty from the spot of contact in today's game. Good power college running backs are taught to drive towards the goal and the really good backs like Ingram, Richardson, and Lacy lead with their heads if it gets the defender out of the way. How long before they change the game so much that we are watching flag football?