The tough part is, the refs do a poor job of calling it on the field. Two of the hits that were shown, one as illegal other as a correct hit, received the opposite call in the game. I know the game is going at a ridiculous speed, but if they are gonna enforce these hits so strictly, they should be able to challenge them when the ref misses it. The fact that Harrison's hit wasn't even flagged just shows you how far off they are from accomplishing this in real time right now.