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Continuity mistake: In the shot of Mitch holding the log just before he runs to the window behind the desk, the brown reclining chair that sits by the fireplace has been moved for the camera. We see it there in the scene when Lydia says, "Did you get the windows in the attic Mitch?" and earlier in the movie when Melanie brings the lovebirds in. (01:41:20)

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Continuity mistake: When Mitch is first seen sleeping on the couch, after the last attack, the red throw pillow is protruding out from behind his right shoulder. The next time he is seen from the front the pillow is totally behind his back. (01:45:25)

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Continuity mistake: After Mitch pours out their drinks on the top of the hill he holds the cap on top of the bottle down with his index finger. In the next shot he's holding the bottle further down and his index finger is around the neck on the side of the bottle. (00:48:45)

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Continuity mistake: As she's attacked in the bedroom the first scratch on Melanie's left forearm moves further up two shots later when see it again. (01:48:05)

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Continuity mistake: As Melanie and Mitch walk up the hill behind his house Bodega Bay is at very low tide with a lot of sand bars showing. When they get to the top of the hill it's high tide. (00:48:00 - 00:52:25)

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Continuity mistake: When Mitch reaches out the window to grab the shutter the curtain has been pushed all the way to the left of his shoulder and he isn't touching it. The next time we see the curtain it's covering the entire window to the left of his head. (01:41:50)

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Continuity mistake: When we first see Mitch on the ladder it's resting against the 6th plank below the window. Mitch never moves it but after Melanie hands him the last piece of lumber and he climbs down it's resting against the 7th Plank. (01:34:00)

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Continuity mistake: When Annie gets up and says, " I think I'll have some of that" her cigarette is half gone with a long ash on it. In the next shot as she fiddles with the brandy bottle her cigarette is brand new. (00:42:50)

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Continuity mistake: As Melanie leaves with the tea to go check on Cathy at the school the left side of Lydia's nightgown changes between shots and is no longer protruding from her sweater. (01:07:55)

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Continuity mistake: Before Mitch rescues Melanie from the telephone booth we can see that all the fires are still burning. But in the shot of him rescuing her they forgot to add the flames out in the road behind them. (01:27:40)

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Continuity mistake: After the final attack as Mitch sleeps in the chair the tabletop and the three items on it to his left are lit up. They get much darker the next time we see them. (01:45:25)

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Continuity mistake: No one went near it, but the chair at the left of the dinner table has been pushed in right up against the table between shots. (00:54:10)

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Continuity mistake: As the birds fly out of the fireplace the silver ashtray on the table to the right of Mitch moves closer to him. (00:54:35)

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Continuity mistake: As Mitch checks everything in the kitchen he walks past the birdcage and looks in it. Look closely at the door of the birdcage as he walks around it. At first it's closed then in the close-up it's open. (01:38:00)

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Continuity mistake: When Melanie lets the bird go, her hands are at eye level. In the next shot they're totally over her head. (00:05:55)

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Continuity mistake: When Mitch picks up the mirror his right hand grabs one of the umbrellas hanging on the right of the mirror. It in the next shot the umbrella has disappeared. (01:43:30)

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Continuity mistake: Mrs. Bundy's handkerchief in the left pocket of her jacket changes from when we first see her walk into the restaurant. Then when the drunk at the bar starts reciting from the Bible, her handkerchief almost disappears and then reappears several shots later. (01:18:10)

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Continuity mistake: As Lydia cleans off the coffee table and walks out with the tray the green pillow on the left of the couch is at the center of the screen. No one touches it but a few shots later as Melanie brings Cathy back from the bathroom it's been fluffed up with the right corner now being higher than the left. (01:39:15)

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Continuity mistake: Mitch picks up the table with both hands holding the legs and this is how he places it up against the fireplace. Later we see it again as everyone exits the house and the table has been moved 90 degrees so that one lone leg is now at the top. (00:55:15)

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Continuity mistake: As Melanie approaches Annie's door, the shade goes up between shots. (00:31:05)

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