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Continuity mistake: When Doc syncs his stopwatch and the dog's, he holds them away from their bodies. A frame later his hands are close to his chest and there's dog hair all around.

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Continuity mistake: When Phil throws the bags out of the trolley, the amount of bags changes drastically between frames.

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Continuity mistake: After Joey's cake lands on the table, George puts his arm to the right of the cereal package. A frame later it's on the left side and holding a pencil.

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Revealing mistake: After Einstein's time travels, when both flames cross Marty and Doc's legs, they cast no shadow, giving the feeling that they are floating, thus giving away the blue screen effect. (00:22:01)

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Continuity mistake: When the 1950s clock chimes and Marty stares at it, a huge scaffolding structure is reflected on a glass billboard, which is nowhere to be seen in subsequent shots of the place.

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Continuity mistake: After the DeLorean with the dog in zooms in between Doc and Marty's legs, all of the angles show that there is no license plate anywhere around. Suddenly it appears spinning in front of them, as if it had been there all the time.

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Revealing mistake: When Marty is skateboarding and being chased by Biff's car, Marty's stunt double is noticeable because his wig is bulkier and darker coloured than Marty's real hair. He looks just like the Trololo guy from Youtube. (01:40:50 - 01:41:25)

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Continuity mistake: After escaping from the Peabodys, Marty stops the car in the middle of the road and exits with his hair all messed up. A frame later it's brushed. (00:33:57)

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Continuity mistake: When Paul records the first video, the screen shows his hair over his forehead, in the rest of the shots his hairstyle is totally different.

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Continuity mistake: When Doc puts Einstein in the car, the dog turns his head inside the car. A frame later, from a new angle, it's outside the car.

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Visible crew/equipment: When Marty arrives at the 1950's town and is about to be run over by a green car, the whole filming crew is reflected on its door. (00:35:40)

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Continuity mistake: After Marty exits the cafe to make himself a skateboard out of two wooden crates, the crates are half a meter apart from each other, but close in the next angle. Also, the chubby kid holding his friend's crate swaps to holding his between one frame and the other.

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Continuity mistake: After Marty is looking in awe at the 1950's records store, his hair swaps from messy to brushed backwards right when he walks backwards on the grass.

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Continuity mistake: When Marty sees the Lyon Estate works there's a mild breeze blowing. Just a frame later, from a new angle, there's a very strong wind. (00:34:18)

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Continuity mistake: When John crashes against the birdhouse, its pole is lying on the car's hood. When Rachel runs to help him, it is not on the hood anymore. It also breaks the windshield, though later it is intact.

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Continuity mistake: When Paul calls his mom his forehead is covered in blood. A second later it's clean.

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Continuity mistake: Paul writes "White" with a long line below the 'I'; however, later on, it appears written with a short line.

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Continuity mistake: When Jack cries he's king of the world he raises his arms pointing in an 11-12 o'clock direction. A frame later, from a different angle, they're in a 9-10 o'clock direction. (00:31:00)

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Continuity mistake: While Dale is watching the destruction of the palace, her head is either tilted or looking straight, depending on the angle.

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Continuity mistake: After Prof. Hobby leaves his glasses on the desk to stab a student's hand, the glasses turn 180º around.

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