Other mistake: At the end of the movie Lorraine has to remind Elise that she helped her once, implying they haven't seen, or spoken since. When Elise first meets Josh in the 1st insidious she tells Josh that her and Lorraine have been friends for a long time, implying they talk or see each other regularly.
Suggested correction: That's debatable as the word "friend" does have to do with semantics. I have friends I have not spoken to in a long time, or speak with rarely, but still consider them friends due to our history. Others would say that's not a friend as that's not what they think of when they hear the word "friend." So it does depend on the individual person. It's also quite possible this is what they told Josh as the cover story for why she was contacted since they initially didn't want him to remember his past.
Revealing mistake: When Keyface is leading Imogen and Melissa on chains, he hits Elise, sending her through the air. When this happens, you can pretty easily see that Elise is played by a stunt-woman. You get a very quick look at her (suddenly much younger) face, and when she lands, you can see that her body is also has a slightly thicker, more toned build than Elise's actress Lin Shaye. (Slow motion helps but is not required).
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.
Audio problem: When Elise is investigating Ted Garza's home and begins to explain how she had seen the female ghost before, she says the line "when I was sixteen years old." However, the words and her mouth movements don't QUITE match. She appears to be saying the right words, but the audio just isn't quite lined up right, likely due to the line being re-recorded in post.
Audio problem: After Elise notices that Ted Garza owns a lot of her family's old belongings still, he gives an explanation about why he held onto it. In the wideshot where he's in the background, if you pay attention, much of what he says doesn't quite match his lip movements, revealing the dialogue was slightly rewritten and rerecorded in post.
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.
Audio problem: When Elise is talking to Specs and Tucker about her childhood home after Ted Garza calls her, when she says the line "because I could never forget the look on my mother's face when she died!", her mouth movements don't match the audio in the slightest.
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.
Visible crew/equipment: When Elise is talking to Ted Garza over the phone, she walks into another room and the camera follows. As the camera goes through the doorway, you can see the shadow of the cameraman pass by on the wall next to doorway on the left side of the screen. True, Specs is following her, but you can see in the next shot that he's not close enough to her to have cast a shadow on the doorway yet.
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.
Visible crew/equipment: When Elise has a vision of Gerald holding a girl captive in the basement, after he makes her drink the fluid to make her sleep, he turns and walks out of the room. As he does so, you can briefly see the tip of a boom mic dip into frame twice from above camera.
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).
Audio problem: When Elise sends Specs and Imogen to get the bible from upstairs, Tucker protests, saying "he gets bible camp with the most beautiful girl on earth...", but his mouth movements don't quite match the words "he gets bible camp", revealing the line was re-recorded in post. (The rest of the line matches, but not those four words).
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.
