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Continuity mistake: When Jason, as a kid, comes out of the mirror and grabs Rennie by her throat, Jason's grip on her throat differ between the shots. (00:32:00)

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Continuity mistake: When Rennie is being pushed overboard, notice the guys sitting in the background wearing a blue shirt. When it cuts from below the ship, as we see Rennie falling, the guy is gone. Also when Miss Van Deusen goes for the life ring, we see from below the ship that the guy is gone. But when it cuts he is there again. (00:29:20)

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Continuity mistake: When we see Jason lying on the bottom of the lake, we also see some chains lying around. At first we see the upper chain lying out on the edge of a plank. But when Jason gets electricity through him we see the chain has moved in to the middle of the plank. (00:06:15)

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Visible crew/equipment: When Sean and Rennie come up the stairs just before finding Sean's dead father, as the camera moves backwards, you can see the camera's shadow on the wall to the right. (00:39:40)

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Continuity mistake: The arrow that Jason shoots at Suzi which hits the wall beside her changes angle when he rips it out of the wall. (00:09:20)

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Continuity mistake: When Rennie gets the present from Sean, she opens it twice in two shots. (00:17:00)

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Continuity mistake: The towel on the guy's head in the sauna changes position between the shots. (00:28:15)

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Factual error: When J.J. sees Jason she drops her guitar running away. The guitar then feedbacks. But when J.J. confronts Jason again he has the guitar with him, unplugged, but still we hear the sound of feedback. (00:21:25)

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Revealing mistake: When we see a wide shot of the ship in the storm we can see the ship slide through the waves untouched by them. It's obvious the scene is a composite. (00:35:45)

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