Continuity mistake: When Elise and Tucker go down into the basement, they hear the whistle and Elise spins around in shock. Between cuts, she instantly goes from holding her flashlight above her shoulder, to holding it down by her chest.
Continuity mistake: During the second night of the investigation, after Tucker and Elise hear the whistle, Tucker opens the door. The shadow his hand and microphone are casting on the door changes positions between edits when it cuts to the POV of him grabbing the doorknob. (First it's on the door, then off).
Continuity mistake: During the second night of the investigation, after Elise and Tucker hear the whistle, Tucker starts to walk forward with his microphone. It cuts to an aerial shot of Elise standing, and you can see Tucker's feet, and he's suddenly standing still before taking a step back, despite the fact he was walking forward in the previous shot. He's also moved forward about 4 feet between cuts.
Continuity mistake: When Elise and the group are setting up for the second night of investigating Ted's house, Elise says Christian reminded him of the red door. The way she's holding the paper in her hands changes instantly between shots. She goes from holding it at an angle to holding it vertically, and her hands slightly change positions on it.
Continuity mistake: After Elise meets her brother at the diner, she breaks down crying and says she was "stupid to come back here." Specs responds by saying "No you weren't, you're helping people..." Specs' arm goes from down by his side to touching Elise's shoulder in a reassuring manner instantly between cuts.
Continuity mistake: When Elise meets her nieces at the diner, when Melissa says "it's really nice to meet you," the direction Imogen is facing changes instantly between cuts.
Continuity mistake: When Elise's nieces enter the diner shortly before they first meet, they walk by Elise. The shot cuts to another angle, and suddenly her nieces walk by Elise a second time. (You can tell from the shadows that move over Elise).
Continuity mistake: When Elise flees her house when she's 16, Christian follows behind her, calling for her. Suddenly, as Christian reaches the bottom of the stairway outside, their father Gerald appears right behind him. This is impossible... Gerald was nowhere to be seen in the previous few shots of the stairway, and furthermore, it was shown that he was walking with a cane and moved slowly as a result, so he wouldn't have been able to catch up to them that quickly. He just sort of... magically appears.
Continuity mistake: During Elise's flashback to when she was a teenager, she grabs her father, pushes him against the wall and makes him have a vision. However, his position on the wall changes instantly multiple times between cuts. Ex. First he's to the left of the painting on the wall... then the right. Then when he falls, he instantly lowers about a foot between cuts. Etc.
Continuity mistake: When Elise is investigating her old bedroom, she runs her hand down a coat that's handing on a rack. In the first shot, she's running her hand down the sleeve. When the shot cuts to her POV, her hand is now suddenly running down the coat's chest and is higher up than it was in the previous shot.
Continuity mistake: When Elise is investigating her old bedroom, a shadow walks up behind her, and she turns around and shines her flashlight on it, and the shadow turns into a coat on a hanger. In the first shot, she's standing sideways looking at the coat. In the next shot, she's instantly turned 90° and is fulling facing the coat.
Continuity mistake: When Specs makes the bad joke about the "Winneba-ghost," Tucker goes from looking forward at Elise to looking sideways at Specs instantly between cuts. Then, in the very next shot, Specs goes from looking at Ted to looking at Tucker and Elise instantly between cuts.
Continuity mistake: When Ted unlocks the locked room (after Specs helps him move the table), Specs walks behind Tucker. In the very next shot, he's back in front of Tucker.
Continuity mistake: When Specs helps Ted move the table covered in bibles, Ted slides one of the bibles under his right armpit to hold it. But in the very next shot, suddenly the bible is in his left hand.
Continuity mistake: When Tucker is demonstrating his voice-activated lights, the way he has his arms outstretched changes between cuts. (In the closeup, they're fully extended, but in the wideshot, they're only partially extended).
Continuity mistake: After Elise wakes up, the way she pets her dog Warren changes between cuts. (She has both hands on him, but in the first shot she's petting him with her right hand, and in the next shot her left).
Continuity mistake: After young Elise is locked in the basement, she cranks the generator to turn lights on. Instantly between cuts, the crank rotates about 180°, going from being all the way down to all the way up.
Continuity mistake: When Elise's father is taking her down to the basement and he screams "I punish people for a living!" watch Elise's mother. Her hands (which were down by her waist in the previous few shots) are instantly up by her neck when it punches in to a closeup of her crying.
Continuity mistake: In the opening scene, when we first see Gerald sitting down, there's a lamp on the table next to him. There is no visible cord coming out of the lamp. A few shots later, suddenly a cord appears on the table, coming out of the lamp. (It can be seen next to the yellow plate).