I have less problem with the drill than I do the technique the runner was using. He intentionally ran over the defender and lead with his head. What we don't know is if he was taught otherwise and just chose to be an a******, was not taught anything, or was taught to run over people. Use a cutback, a spin move, or a stiff arm, anything but your head.
But of course if that were me back in day, I'd be the kid running over the other kid and we'd all be laughing about it. But the 70s were a different time. LOL