This is one of the scariest films I've seen in a long time and I can't put my finger on just why it affected me to the point that I had to put it on PAUSE to catch my breath. First of all, I've seen a lot of scary, hellish, fiendish movies, but the fact that this movie depicted what could occur in real life is what hit me to the core. Was it the way it was filmed? As always, Jim Caviezal is a gifted actor no matter what part he plays and that added to the real-life drama of the film. There is nothing to "get." It is the story of a couple trying to resurrect their failing marriage in an environment that requires both trust and teamwork, clearly two traits they both lacked. The title of the movie is ridiculous because it really doesn't have anything to do with how NATURE attacks people for being careless, but more how careless people attack each other when put in a primitive environment. This was clearly a movie on how "civilized" man can turn quite uncivilized when fear takes over--even our modern day "saviours" such as the cell phone and GPS cannot always save us...especially from ourselves. A very disturbing little film...and yes, I wondered about fate of the dog too.