The zebras in our game were shitty to say the least. Watching the replay of that run of LF above from behind. LF doesn't stick his arm out and simply "stiff arm" the defender. He draws back and delivers a blow to his head. If hands to the face can and is called on OL and DL play, and a facemask can and is called both offensively and defensively, then this fits in that category. The question of a punch would be up to the official to call. Running towards your sideline with your coaches barking and begging for every call definitely helps sway the judgement.