The entire winter in The Shining.
 
That's a three undershreddies change.

One movie scene that still creeps me out to this day is from the original "The Haunting" (1963). Two woman are sharing a room together in the haunted mansion and are sleeping in separate beds about 3-feet apart. During the night there are strange noises and commotions. One of the woman calls out to the other to take her hand while they each lay pretrified in their beds. Things continue to get worse as the walls start to breath. Finally it climaxes and everything stops. They turn on the lights and find their beds are separated by about 6-feet. What a moment (especially for an eleven year old kid).

Can't think of one at the moment, but I definitely remember laughing all the way through the Exorcist.

bapu
The entire winter in The Shining.
 
That's a three undershreddies change.

This^.
 
I think when I first saw it the scariest part was actually when she reads the "book" Jack had spent so very much time working so hard on.
 
That and the Big Wheel, and the two little girls, and...

I watched a hooky copy of the exorcist which I think was officially banned at the time, when my parents were out and I was far too young and I think a bit of wee may have come out when her head did the 360, but can honestly say that any "horror" film I can remember seeing since has never scared me as such.
 
The original version of "Patrick" certainly made me jump at the end, but I don't know if that would be classed as horror and I guess "Asylum" (70s film) creeped me out a bit, but again I was only about 10 at the time I saw it.
 
The scariest film related moment in my adult life was during "what lies beneath", not because the film is particularly scary, but because the electric in my house chose to go off at exactly the point HF pulls the fuse in the movie !
 
I find vampires films and all that stuff totally boring and/or laughable.

 
 
For me, one the best was at the end of Carrie, when the hand pops out of the ground and grabs Sue's ankle.

My scariest movie experience was watching the Wizard of Oz on TV at age 3.
 
I had never seen a movie before. I had never seen a television, because we didn't have one at home - just a radio and a record player (I was so deprived as a child, they had me reading books at age 5, but there was no CPS to appeal to back then).
 
Mom & Dad had just dropped me off at a babysitter, with strangers I didn't know, so I was already on edge. They plopped me down on the floor in front of the television and said "you're gonna love this!". I did not. Now, if they'd said "you're never gonna forget this", then they'd have been right. I never did.

jamesg1213

sharke
I find modern horror movies to be utterly unscary. They focus too much on effects and gore with none of that genuinely weird creepiness which taps into your nightmares. The movies of the 70's and 80's, particularly the 70's, were much better at harnessing this kind of inner terror. Maybe it was because everyone was dropping acid back then, I don't know. 
 

 
I was telling Steve about this film recently, 'Whistle and I'll Come to You', it's one of my favourites. M R James' ghost stories are often set in desolate coastal areas in the UK, and feature something half-glimpsed, and a slow-building sense of dread. This is worth watching just for Michael Horden's wonderful performance.
 
https://www.youtube.com/watch?v=mYjtxHHjZ00

And an excellent watch it was too mate.
 
Although not as subtle, some of Roald Dahl's Tales Of The Unexpected TV series included a great twist at the end. The one I remember to this day was the episode where an old man sets up a bet with a younger chap as to whether his zippo lighter will light ten times in a row. He puts up his Jag as his stake should the guy succeed, but if he fails, he gets to cut off the little finger of the guy's left hand.
 

I got take to see the excorscist in theaters as a 4 year old by a cruel but cool otherwise uncle. Scared me ****less especially coming from a very religious household. 

SteveStrummerUK
 
 
And an excellent watch it was too mate.
 
Although not as subtle, some of Roald Dahl's Tales Of The Unexpected TV series included a great twist at the end. The one I remember to this day was the episode where an old man sets up a bet with a younger chap as to whether his zippo lighter will light ten times in a row. He puts up his Jag as his stake should the guy succeed, but if he fails, he gets to cut off the little finger of the guy's left hand.
 
 

Some of the twists in those were indeed very good, but watching them now the acting seems more wooden than the woodentops.