The Ending of The Mist

Can someone tell me how Steven King's new movie The Mist ends? This bit of spoiler information seems to be shrouded in secrecy, and I abhor secrecy as I do death threats:

King: "Frank wrote a new ending that I loved. It is the most shocking ending ever and there should be a law passed stating that anybody who reveals the last five minutes of this film should be hung from their neck until dead."

If you really want to know what the end is, here you go. You've been warned.