Football:
This is an absolute must-read. Breaking down what GP has made work for nearly two decades on defense and figuring out how to translate that to offense.
It gets very complicated for the defense to match up to this without actively involving a safety and perhaps even both of them. The unblocked defensive end that the QB is reading will tend to step inside to take away the cutback lane and help spill the ball to the middle linebacker who's out in space. If he crashes too far inside though then the defense may struggle to corral the QB in space when he pulls the ball.