The genre of the horror film is a tough one to make even remotely scary, much less innovative or original at all. We've seen it all again and again and again: the wild animal with a taste for blood, the psycho on a killing rampage, the mad scientist with something to prove, zombies, the supernatural, and don't forget the devil. Some times the B movies get it right, but mostly it's the same.
Hour of the Wolf is the exception. The trailer doesn't do it justice, but this is the type of film which is not scary while you watch it, but sneaks up on you later like when you can't sleep or have to get out of bed late at night to go to the bathroom or get a glass of water.
Maybe too much weed has turned my paranoia into straight fear, but the Hour of the Wolf taps into some base fears. If you watch it, prepare to be straight creeped out for many nights to come.