Panic Attack: 22 creepiest horror movies

Criteria for selection of these creepy movies were the creation of a sense of panic, nightmares, claustrophobia, repulsion, and irritability.
Here is a list of 22 of the creepiest films I've seen - in no apparent order.
Enjoy:
  1. Hellraiser 1987
  2. The Descent
  3. Wicker Man 1973
  4. Rosemary's Baby  
  5. Wendigo
  6. Donny Darko
  7. The Birds
  8. Halloween 1978
  9. The Hills Have Eyes
  10. Gaslight 1944
  11. The Haunting 1963
  12. American Werewolf in London
  13. Gothic 1986
  14. Carrie 1976
  15. Creature from the Black Lagoon 1954
  16. The Blair Witch Project
  17. The Texas Chainsaw Massacre 1974
  18. The Boys from Brazil 1978
  19. Christine
  20. Children of the Damned 1963
  21. Scream
  22. The Shining