Apparently, Andy McDonald's helmet was almost cracked completely in half from a shoulder to the head hit against the glass in game #2. truehockey.com said McDonald showed it to the reporters after the game.
That's two in a few days??
Damn...I guess I stand corrected. I've played hockey a long time and I have never seen a helmet crack as badly as Zetterberg & McDonald said their helmets cracked. I've never had a helmet crack, and I've taken some shots, even a couple that left me a little whoozy.
I also can't recall ever hearing about a helmet cracking like that in an NHL game until these two. I'm not saying it's never happened, but I don't remember hearing about it.
And to answer a couple comments...
I never said I didn't think helmets weren't designed to crack to displace a severe blow. I had just never seen it happen and didn't think they could crack that easily.
I wish they'd publish photos of these cracked helmets. I'd love to see how they cracked.
If you google "cracked nhl helmet" the first two links are the Zetterberg & McDonald incidents from the past few days.
McDonald's cracked helmet from an elbow he took in Game #2 vs. San Jose.

Crazy. Again...I stand corrected.