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Continuity mistake: When Gilbert and Amy are unloading the groceries onto the porch, some bags fell over but in the final shot of the scene, all the bags are standing up, even though no-one could've touched them.

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Trivia: During the scene where Darlene Cates (Mama) climbed the staircase, she climbed only the first two or three steps. This footage was reused to show her climbing the entire staircase. The room which served as her upstairs bedroom was actually a downstairs room.

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Revealing mistake: During the rainstorm, after Gilbert delivers Becky and her groceries back to the camper, they are embracing in the rain and hoping that Nana won't get the camper started. You can see sunlight reflecting off the truck, their hair and their shoulders, even though they are standing in a supposed downpour with a completely cloudy sky.

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Revealing mistake: Mama's eyes twitch as Arnie is bouncing up and down on her bed, even though she's supposed to be dead. Later, when the kids are around her in a vigil, she is very obviously breathing.

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Factual error: At the beginning of the movie, you can see the reflection in the "ENDora OF THE LINE drugs" store window, of a blue and white Manor (Texas) police car as it drives by.

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Visible crew/equipment: When Mama comes out of the police station, a bounce card (light reflector) is visible.

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Continuity mistake: At Arnie's party, from outside the house, Mama is seen looking out between two curtains. Later, from inside the house, she is looking out the window while lifting up a window blind.

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Revealing mistake: When Gilbert finds Arnie in the bath and takes him out, you can see a towel around Arnie's waist.

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