The whole idea of this movie sounds upsurd and stupid. But, with Thomas Jane's skills pulling the ammeture actors up and the scary creatures beautifully created by cgi artists, it's a hit. Most announce the ending as "horrible" or "really dumb" I, on the other hand, classify the ending as being horrifically stunning and jaw dropping. It is not something you'd want to happen, and it is also something you would NEVER have expected. What a twist.