You only need to watch it once, at full speed, to see it, just need the right angle. I suggested that particular sequence for you to see, not because that's where I saw it, but simply because the move is obvious from that perspective and the shot right after. If you wanna run someone flat on the boards, that's not how you're gonna use your leg, which makes your comment about playing hockey even more absurd. If I want to do a dirty hit, that's one of the ways to go, even easier if you're stronger than your target, push the leg up and bump the shoulders with the upperbody, you'll get that kinda tilt. It's obvious to many, so you can quit the comments about who's done what. Also, I personaly saw it live and thought right away that he used his knee to prop KK off balance, a typical charlie horse, and the replays only confirmed what I saw, what many saw.
You'll just have agree to disagree with me