According to Britain's Channel 4. Does anyone else find the lack of specificity a little irksome?
The 20 top scary moments in alphabetical order are:
28 Days Later (2002) - Fleeing from the zombies.
Alien (1979) - Alien bursting out of John Hurt's stomach.
An American Werewolf In London (1981) - The transformation into a wolf.
A Nightmare On Elm Street (1984) - First appearance of horror icon Freddy Krueger.
Don't Look Now (1973) - Donald Sutherland thinks he has found his daughter.
Friday The 13th (1980) - The killer bursts out of a lake at the film's finale.
Halloween (1978) - Killer Michael's face appears behind Jamie Lee Curtis in a house full of bodies.
Hellraiser (1987) - First appearance of Pinhead.
Jaws (1975) - Severed head pops out of boat.
Psycho (1960) - The shower scene.
Ring (1998) - Sadako crawls through the television.
Se7en (1995) - Discovery of the emaciated man.
The Blair Witch Project (1999) - Heather Donahue in tears in the woods.
The Evil Dead (1981) - General mayhem in Sam Raimi's classic gore-fest.
The Exorcist (1973) - Possessed girl's head spins and she projectile vomits.
The Omen (1976) - The Oscar-winning eerie music score.
The Shining (1980) - Jack Nicholson chops through the door and shouts "Here's Johnny".
The Texas Chainsaw Massacre (1974) - Leatherface's reign of terror.
The Thing (1982) - A man's chest splits open as he is being given defibrillation and the medic's arms are bitten off.
The X-Files (1993) - Episode called Squeeze featuring the scary character Tooms.