Stephen King's The Mist.
Started ok. Spooky mist, good CGI, crazy christian lady, so far so good.
A decent B-movie plot with A-movie production.
Then the ending... like the kiddies say: OMFG! (that translates to oh my f****ng God!, if anyone is interested)
I was really caught off guard by the ending. Can they do that in a hollywood movie nowadays?
The Mist gets my recommendation.
EDIT:
I just realised, they should have called it the 'Myst'. Or maybe not.