I saw it live, and have seen the replay a thousand times now, and there's no way it was anything but accidental. They showed a highlight on a local sports show that showed the same exact thing happening about a hundred different times in games, with the players leg going up like that, obviously without the injury tho. It seems to be far from uncommon.
Now as for Matt Cooke, he definitely has the reputation of a dirty player, and rightly so. But anyone who has followed the Pens over the course of this season and last knows that he has made probably the biggest change of anyone in the history of hockey, in terms of his play. "Dirty" Matt Cooke is a thing of the past. Hell, hes even played his way onto a line with Malkin and James Neal. But I do understand it takes more than a year to totally change your reputation.
As for the comments from the Sens GM/Owner or whoever it was, those were a bit much. Calling him a goon that shouldn't even be in the NHL? Really? When one of the biggest straight goons in the league plays on your team, in Neil. The cheap shot he put on Cooke followed by the 3 sucker punches to the head at the end of that game was just as bad as anything Cooke has done in his career.