beeing unlocked increases the threat of the footsteps creeping up the stairs. An extra dimension of terror is provided by the narrow strip of light under the door with its ominous guillotine-like shape. When the passage lights suddenly goes out as the footsteps reach the door, it's like the blade falling; the startling of the audience; when the lights goes out a further increases in the intensity of terror take place. The film does not show the murder or the dismemberment, not even a drop of blood, but
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