Here's video evidence of Sid Vicious - also known as Sidney Crosby - landing a few blows to the back of the head of Boris Valabik.

And because that wasn't bad enough, Crosby then throws a couple of haymakers at his opponent's balls. Because they had it coming, you see.

Ah, hockey. So delightfully violent. Don't you ever change.

Puck Headlines: Sidney Crosby trains on Valabik's speed bag [Puck Daddy]