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Revealing mistake: Before Mary is incinerated, she is shown standing behind the door looking through the T shaped window. Only a portion of her face is seen with her right eye on the left side of the opening, and some hair wavy over it. The shot cuts back and forth between her and Preston a few times, then the camera zooms in on Preston's eye. Mary's reflection is in his eye, however it is not a mirror image when it should be. It should be a mirror image reflected. (01:22:20)

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Revealing mistake: During the fight where Preston deploys his lethal pistol whips on the Grammaton cops, watch closely towards the end of the sequence. There is a semi close up of one of the cops getting nailed in the face with Preston's gun. His helmet's visor shatters and you can see some red come off it, supposedly blood. But you can see there is a second layer of protective visor sunk back in the helmet to protect the actor's face from shattering glass/plastic. (00:59:00)

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Revealing mistake: Preston pulls his bathroom mirror out of the wall so he can hide his Prozium behind it. The shots taken from inside the hole in the wall have some sort of blue glow at the very bottom. You can tell this is some sort of light, probably on the camera itself, as when the mirror is put back on the wall, it should be pitch black inside the hole as it blocks out all light. But the blue glow remains. (00:53:35)

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