WHY did Sam drop the knife?  I know that couple isn't the sharpest in the shed, but he kills some crazy magic snow zombie and then just leaves the weapon there?  No friggin' way, how stupid.

Pretty sure those tears were real, that part got me too.

I'm suprised that no one else has said anything about that part.  It was like he was actually thinking, "This is my last line" while he said that.  Those tears seemed pretty damn real.