Maybe... but we've seen Sam get angry before, maybe never to that extent but I think it's definitely there inside of him. He's carrying a lot of baggage this season, and between Dean's deal and his own question over what he is and what his 'destiny' is, I'm not surprised that he's lashing out.

Ahahaha. That one always makes me laugh. ;)

Incidently, we passed 800 awhile back. Go us!