Without having rewatched it yet, my thought on the mask was that when he was on his back, his helmet was already halfway off his face. I feel like I've seen it before where for their own safety they knock their helmets off to get the whistle since half of their face is exposed and they can't see anything. As for Drake, my hope is that he was just pushing off to turn and go the other way. Not sure what he'd be thinking checking the goalie in the back.