What horor movie is the most scary you ever seen ?

Priest (2011)

Red Riding Hood (2011)

Insidious (2010)

Dylan Dog: Dead of Night (2010)

The Rite (2011)

World War Z (2012)

The Human Centipede (First Sequence) (2009)

The Ward (2010)

Stake Land (2010)

The Tunnel Movie (2011)

Scream 4 (2011)

Infection: The Invasion Begins (2010)

Zombieland (2009)

Devil (2010)

Seconds Apart (2011)

The Human Centipede II (Full Sequence) (2011)

TrollHunter (2010)

I Saw the Devil (2010)

Bite Marks (2011)

Let Me In (2010)

Slices of Life (2010)

The Bleeding (2011)

Resident Evil: Afterlife (2010)

Tucker & Dale vs Evil (2010)

Vanishing on 7th Street (2010)

Psycho

Alien

The Shining

The Thing

What Lies Beneath

The Blair Witch Project

The Ring ...

Drag Me to Hell

The Descent

Trick 'r Treat

The Mist

Splinter

Piranha 3D (not necessarily scary, but so much fun)

Cube

The Ring

House of 1000 Corpses

SCREAM 1,2,3,4

Uninvited

1408

Human centipede

Paranormal Activity (1 and 2)

Insidious

Quarantine

The Exorsism of Emily Rose

teeth

The Amityville Horror

nightmare on elm street 1,2,3,4,5,6

friday the 13th-all of them

the collector

American Psycho

saw 1,2,3,4,5,6

Dark Water

The Grudge

The Messengers

The Messengers - The Scarecrow

Jeepers Creepers

Slither

halloween

Dead Silence

Texas Chainsaw Massacre

The Exorcist Movies

case 39

let me in

The reeds

frozen

final destination 2

DEVIL

Devil's Rejects

The Evil Dead

The Fourth Kind

The Haunting (1963) - a classic film about a haunted house. This film achieves a spooky atmosphere and some good chills with no gore or fancy special effects. An intelligent, psychological horror movie. Best watched late at night with the lights off. Avoid the abysmal 1999 remake at all cost.

The Changeling (1980) - another haunted house film. This one has an big, ancient house with a dark and mysterious past. It's a good film that provides some great chills. Stars George C. Scott.

Ghost Story (1981) - a good spook-fest. Good story with a tragic background. Based on the Peter Straub novel of the same name. Stars Fred Astaire, Melvyn Douglas, Douglas Fairbanks Jr. and John Houseman.

The Entity (1981) - Based on a reportedly true story about a single mother who is repeatedly attacked and terrorized by an malevolent invisible presence. Pretty scary - especially late at night. Stars Barbara Hershey.

The Thing (1982) - one of John Carpenter's best. As another person already stated, this is a great film about paranoia, survival and cosmic horror. One of my favorite horror films of all time. A pretty faithful adaptation of the novella Who Goes There? by John W. Campbell, Jr.

The Exorcist 3 (1990) - starring George C. Scott, this is a genuinely creepy and disturbing film. Simply ignore the fact that it's supposed to be a sequel as its story stands on its own and has only minimal connection to the original.

The Ring (2002) - I first watched this film on cable late one night, alone and... it was pretty frickin' scary. Great build up, atmosphere and creepy back story. If you haven't seen it yet, check it out.

Well, that's all I can think of off the top of my head - and I have to get back to work. ;-)

SHAZAM!!!

The grudge 2, English & eastern version. that is hella scary at the same time as the lady pops out of nowhere. i have been scared ever because then. Now i'm afraid to brush my tooth and look on the reflect reason she might want to pop up :(

Being a horror movie buff, I'd recommend John Carpenter's The Thing. It's a psychological thriller about a group of researchers cut off in Antarctica, dealing with a shape shifting alien who wants to kill them all.

I dont get scared easily so ill just put some scary movies i saw...

Vanishing on 7th street

the crazies

paranormal activity

hide and seek (dakota fanning)

amityville horror

ghost town

all i can remeber

Excorsist

The Grudge & Hellraiser

Rainbows and Sunshine and everything Nice is the scariest because itsss soo sweet and nice.

Case 39

Haha; I don't remeber but this was one that I recently saw and it was kind of scary!