Continuity mistake: When Keyface is attacking Elise, Imogen grabs the whistle out of her pocket. At one point, the way she is holding it changes instantly between cuts right before she throws it to Elise.
Continuity mistake: When Melissa is attacked by Keyface, the blood on her forehead, nose and face changes slightly a few times over the course of the scene. (Likely due to it being reapplied and not quite 100% matching several times during filming).
Continuity mistake: When Keyface strikes Melissa, she bounces off the wall then starts to fall forward onto the ground face-down. However, when we cut to a closeup of her hitting the ground, she's suddenly falling backwards and lands on her back. Her entire body somehow rotated 180° instantly between cuts.
Continuity mistake: When Elise introduces herself, Specs and Tucker to Ted Garza, Tucker is eating an ice cream sandwich. The amount of sandwich he's eaten and the position of his hand repeatedly changes between shots.
Continuity mistake: When Elise first leaves her home to travel to see Ted Garza, when it cuts from a closeup to a wideshot of her carrying her bags down the stairs, the direction she's facing and the look on her face changes subtly between shots.
Continuity mistake: When Elise is explaining to Specs and Tucket that Ted Garza lives in her childhood house, after the initial long shot of her talking, it cuts to several over-the-shoulder angles. Instantly, Elise's hands go from down on the table in front of her to up holding her face in these over-the-shoulder shots. Over the rest of the scene, her hands continue to change positions repeatedly as it cuts between the different angles.
Continuity mistake: In the opening scene, when young Elise is talking about the man who was executed, we see her mother standing at the kitchen sink, staring at her. In the very next shot, suddenly she's no longer standing at the sink (which is visible through a window in the wall) and instead is walking into a doorway at the other side of the kitchen. She warped about 10 feet to the left between cuts.
Continuity mistake: When Specs starts the process of trying to hypnotize Imogen, after he makes his "E.T." jokes, as it cuts back and forth between him and Imogen, his hand is either raised or lowered instantly depending on the angle.
Continuity mistake: When Elise finds the skull in the suitcase, she's holding it above the center of the case. When it cuts to the opposite angle, suddenly she's holding it over the side of the case.
Continuity mistake: When Tucker prices the fan out of the wall, he places his flashlight down inside of the vent, and it's pointed slightly to the right side of screen. When we see the suitcase hidden in the vent few shots later, we can see the flashlight's beam hitting it right around the center... which is impossible from the direction the flashlight was facing in the opposite camera angle.
Continuity mistake: When Elise walks over to the grated fan and finds something inside, the way she's holding the front of the fan changes instantly between cuts. (Her hand lowers a good 8 inches between cuts).
Continuity mistake: When Elise leaves the interview with the detective at the hospital, his hand goes from up and holding a pen to down flat on the table holding nothing instantly between cuts.
Continuity mistake: When Elise is being interviewed in the hospital by the detective, the way he's holding his pen instantly changes between shots as we cut from outside to inside the room.
Continuity mistake: After Specs kills Ted, we see Elise being interviewed by police outside as Mara is taken away to the hospital. Depending on the camera angle, sometimes Elise has police lights reflecting on her face, and sometimes not. It changes instantly between cuts several times. There are a few other minor continuity gaffs with the police lights throughout the scene as well.
Continuity mistake: When Specs kills Ted by pushing the armoire onto his head, when it crashes down, a huge crack forms in the side of it. The crack is missing in every subsequent shot of the armoire.
Continuity mistake: When Tucker takes the hidden door from Elise and finishes opening it, he goes from holding it with one hand to both hands instantly between cuts.
Continuity mistake: When Elise uses the key to open the hidden door in the basement, her left hand suddenly appears on the door instantly between cuts. (It wasn't there in the previous shot).
Continuity mistake: After Elise returns to the basement with the keys, Tucker is holding his flashlight above his shoulder. It then cuts to a closeup of him, and he raises his flashlight above his shoulder a second time.
Continuity mistake: When Elise is communicating through the wall by asking yes-or-no questions and getting responses via whistle, in the shots facing Elise, she's staring forward directly forward. But in the shots facing the wall, her head is turned sideways and pressed up against the wall. This happens instantly between cuts at least once.
Continuity mistake: When Elise and Tucker go down into the basement and hear the whistle, Elise approaches the wall. As she does, her right arm is bent up by her abdomen. When the camera cuts, you can see from her shadow that her right arm is instantly now down by her side.
