20 Things You Didn't Know About Halloween (1978)
2. How The Shape Appeared Behind Laurie
When Laurie Strode goes to the Wallaces' house to investigate what has happened to her friends, she makes the almost fatal mistake of edging back towards an open, darkened doorway.
Fans of the film will remember that The Shape then gradually materialises from the darkness as if he is stepping forward to intercept her.
The truth behind this scene is far less sinister than its onscreen presentation, but it is a successfully chilling effect: Nick Castle simply stood still in the darkened room beside Jamie Lee Curtis and an assistant on set used a dimmer switch to gradually turn up the lights in the room, making it look as though The Shape was noiselessly closing in on Laurie.