Phantasm II (1988)

Revealing mistake: As Reg fights with one of the baddies with the chainsaws, as the baddie take a swing with the chainsaw he misses and cuts into the wooden door. You can clearly see that a vertical cut has already been made in the wood though, to help the chainsaw get in and cut.

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Hamster

Continuity mistake: When Reg and Mike break into the hardware store for tools, the items in the trolley keep on changing from shot to shot, and also change position too.

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Hamster

Continuity mistake: When Reg and Mike jump out of the bedroom window to escape from the dwarfs, in a wide-shot the white window framing on the sides of the window is broken off. But in a closeup of the dwarfs looking out of the window, the white wooden framing has reappeared on the sides of the window.

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Hamster