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Revealing mistake: When the lightning strikes the metal pole in Jason's grave for the second time, a wire is visible attached to the tree where the electrical explosion appears. (00:06:00)

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Revealing mistake: When we see a closeup of Jason opening his eyes for the first time he is supposed to be lying down in his coffin. One of the maggots falls across his face. If he was really lying down the maggot would never fall like that. (00:06:15)

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Revealing mistake: When Jason rams the iron pole through the windshield of his first victim's car, the windshield breaks like normal glass. (00:13:50)

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Revealing mistake: When the clumsy guy is running in the forest you see him tripping in some bushes. Then some wire, probably used to tie up the bushes, gets stuck in his feet and he is struggling to get it away as he is stumbling. In the next shot the wire is gone. (00:22:05)

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