Okay, I just read an article that had a picture and everything to back up the thought that Chara hit this Pacioretty into this very specific spot on purpose. He did NOT do this on purpose. Chara is not a dirty player, he plays hard and he plays physical but he does not play with the intent to hurt someone even for "revenge". Yes, he did mean to push him, very hard I presume. But what are the odds that in that small amount of time that Chara was next to him, getting ready to check him into the boards, that Chara saw the edge of the glass and thought "oh I'm going to shove his face right in that exact location!" That doesn't make any sense. I'm an athlete too and I am VERY physical but I never plan exactly where I want someone to fall. Chara wasn't planning to slam his head into the end of the glass, that just happened to be the location. And if this was another player, a dirty one, then maybe you might have a chance of saying this was intentional but look at Chara's history. He is not a dirty or cheap player. Even if it was intentional, which it is not, he would not have meant to send Pacioretty to the hospital. I doubt any hockey players plays with the intent to hospitalize other players. 

SO to sum it all up, yes the check was hard and intentional but what WASN'T intentional was the placement of the hit and Pacioretty's injuries. Chara meant to check him, not wreck him.