The Scariest/Most Disturbing Movies I've Ever Seen

This is a list of movies that either had me screaming and jumping or nearly vomiting in disgust/horror.
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1.
Paranormal Activity (2007)
    1 2 3 4 5 6 7 8 9 10 6.3/10 X  
After moving into a suburban home, a couple becomes increasingly disturbed by a nightly demonic presence. (86 mins.)
Director: Oren Peli
“ I watched the entire movie by myself in the dark, I got scared but it wasn't until the final moments where I screamed in fear. ” - disturbedkira
 
2.
Paranormal Activity 3 (2011)
    1 2 3 4 5 6 7 8 9 10 5.8/10 X  
In 1988, young sisters Katie and Kristi befriend an invisible entity who resides in their home. (83 mins.)
“ I screamed so many times through out this movie, this was the first movie I ever had to pause because I was so freaked. ” - disturbedkira
 
3.
Cannibal Holocaust (1980)
    1 2 3 4 5 6 7 8 9 10 6.0/10 X  
During a rescue mission into the Amazon rainforest, a professor stumbles across lost film shot by a missing documentary crew. (95 mins.)
Director: Ruggero Deodato
“ This movie made me sick to my stomach, I just watched it and sat there horrified. It also made me fear men more. Haha. ” - disturbedkira
 
4.
The Shining (1980)
    1 2 3 4 5 6 7 8 9 10 8.4/10 X  
A family heads to an isolated hotel for the winter where an evil and spiritual presence influences the father into violence, while his psychic son sees horrific forebodings from the past and of the future. (146 mins.)
Director: Stanley Kubrick
“ The first time I watched this movie I was only 12 and I was the only one awake at a sleepover in an unlocked camper on my friend's driveway in the middle of March. Not only was I shivering and shaking from the cold, but from how terrified I was. ” - disturbedkira
 
5.
Poltergeist (1982)
    1 2 3 4 5 6 7 8 9 10 7.4/10 X  
A family's home is haunted by a host of ghosts. (114 mins.)
Director: Tobe Hooper
“ The scene with the researcher ripping his face off in the bathroom made me so queasy and I couldn't watch the movie again for a year or so. ” - disturbedkira
 
6.
Mirrors (2008)
    1 2 3 4 5 6 7 8 9 10 6.2/10 X  
An ex-cop and his family are the target of an evil force that is using mirrors as a gateway into their home. (110 mins.)
Director: Alexandre Aja
“ I hadn't known anyone who'd seen this movie before I decided to, and I was so traumatized by the bathroom scene I wasn't able to look at my mirror for a while. ” - disturbedkira
 
7.
Jurassic Park (1993)
    1 2 3 4 5 6 7 8 9 10 8.1/10 X  
During a preview tour, a theme park suffers a major power breakdown that allows its cloned dinosaur exhibits to run amok. (127 mins.)
“ As a little kid, this movie gave me some of the most disturbing (if not just plain messed up) nightmares ever. For years I watch it over and over, but always covered my eyes during the deaths. ” - disturbedkira
 
8.
Children of the Corn (1984)
    1 2 3 4 5 6 7 8 9 10 5.6/10 X  
A young couple is trapped in a remote town where a dangerous religious cult of children believe everyone over the age of 18 must be killed. (92 mins.)
Director: Fritz Kiersch
“ Again, I was watching this movie with my friend in her camper on her driveway. Smart idea. I was so frightened by the opening scene, but nothing else scared me but Joseph sitting up and spooking Vicky. ” - disturbedkira
 
9.
The Messengers (2007)
    1 2 3 4 5 6 7 8 9 10 5.4/10 X  
An ominous darkness invades a seemingly serene sunflower farm in North Dakota, and the Solomon family is torn apart by suspicion, mayhem and murder. (90 mins.)
“ This was one of my first horror movies, and I was so panicked the entire time. The ghosts scared me so bad, I was sure I was going to have nightmares. ” - disturbedkira
 
10.
The Thing (1982)
    1 2 3 4 5 6 7 8 9 10 8.2/10 X  
A research facility in Antarctica comes across an alien force that can become anything it touches with 100% accuracy. The members must now find out who's human and who's not before it's too late. (109 mins.)
Director: John Carpenter
“ I didn't watch this until my sophomore year in High School, and I was so scared that I screamed and yelped multiple times. ” - disturbedkira