As someone whose feet get pretty clumsy (and let's be honest, anyone who has skated and managed to do it backwards has cow-tipped before) I just can't see a reality where Petgrave was trying for a two-for-one where he checks the off-puck man and also stretches out to get a little extra on the guy who actually has the puck. I one had my forearm cut elbow to wrist by some guy eating shit, it can absolutely happen. It was shallow and no big deal, but I got it up in protection of my face so.... could be telling a different story. NHL has had plenty of close calls around facial/neck injuries and lacerations, it isn't even close to the first time it's been done by accident.
Like, it's an ugly video and I'm not going to invite anyone to watch it again, but when Petgrave is coming in from the blue line if he really wanted to seal off Johnson he wouldn't swing a leg out and trip him, he'd check Johnson. That would have essentially been "his guy" and he would have been within reason to just hit him if he wanted to obstruct his progress, I'm not sure what his actual thinking was (because in my mind Johnson is the guy you should mark anyway) but I just don't see how he's making a calculated play to do both.
Instead he comes in and marks a guy at speed, and it looks to me like their skates hit each other. It also seems like, going the speed he's going, he basically just hit a firm stop in the lower body department and eats a big bag of blank while Johnson happens to cut into the lane he was just in.
It sucks big time, I don't think there's a way to say that enough, but I also have a really hard time convicting a guy based on what I saw. If that's our bar, the guy who got Malarchuk should have been charged as well.