10 Subtle Ways Horror Movies Made You Feel Uneasy

10. The Sound Techniques - The Exorcist

Most horror fans will have watched the iconic, classic release of The Exorcist, which was unleashed into the world in 1973 to much excitement and religious fervour. It was directed by William Friedkin and starred Linda Blair as sweet Regan MacNeill, a young girl who is eventually tormented and possessed by a demon.

The film itself is creepy enough, as it explores in-depth the evil that takes over the child, but some of the elements of this iconic 70s production make a startling impact on the fear-factor. For instance, it has been said that Friedkin used sounds recorded at an abattoir, which were played in the background of key possession scenes. Added to that, the voice of the tormented Regan was made all the more disturbing with the use of a voice-over by actress Mercedes McCambridge.

McCambridge provided Regan's speech, and stated that she smoked several packs of cigarettes a day in order to get the raspy, creepy effect of the demon's voice. She was also reported to have eaten raw eggs and and drank volumes of whiskey, all in an attempt to make the voice coming out of the young girl feel exceptionally gritty and unnerving. The effect of hearing such a voice coming from a child is shudder-inducing.