Saw

Not only does this movie create an extremely tense atmosphere the moment it starts, it has plenty of gore and violence to bombard your eyes, not to mention that it has one of the best twists seen in any horror movie.

I watched this film alone at night with the lights off, expecting to be freaked out by it since I thought it was just another typical horror movie; but instead I was completely intrigued by the story line, and utterly drawn into the film for the whole 100 minutes. At the end I did not feel scared, rather, I felt something very few horror movies have to offer: satisfaction! This movie left me in a slightly disturbed but very thoughtful state. It did not give me nightmares, rather, it plagued my day-dreams; for two days my thoughts could not stray far from this film, that's how powerful it is.

If you want a cringingly gory and violent horror movie, watch "The Texas Chainsaw Massacre" or "Hostel"; if you want a nightmarishly scary horror movie, watch "The Grudge" or "The Ring"; if you want a clever and disturbing horror movie with an excellent story and a great twist, watch "Saw".