Revealing mistakes: When Eleanor runs into a room in Hill House, a close-up shot shows a mirror fall off a mantle on its own. However, a wire is visible attached to the middle of the back of the mirror and going through a hole in the middle of the wall behind it. When the mirror falls, the wire goes slack as the wire feeds out of the hole in the wall, meaning the wire was held taut to hold the mirror up on the mantle until it was time to release the wire.
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