Continuity mistake: Nancy has a grey streak in her hair from the first movie. However the streak is in the right side of her hair, when it was in her left side previously. The streak length changes throughout this film too. (00:11:50)
Continuity mistake: When Kristen's mom comes in and tells Kristen to go to bed, in the first shot Kristen's pillow lays flat on the bed. In the next shot it is propped up against the bedstead. (00:03:30)
Continuity mistake: In her dream, Kristen does a back flip, and Freddy lungs at her, misses, and punches the wall. Yet in the next closeup Freddy rips his knife fingers out of the wall, as if his hand went straight into the wall. (01:09:25)
Continuity mistake: The day Kristin is admitted into the hospital, she is screaming and fighting with the staff. She then cuts Max on his right inner arm with a scalpel. In the next scene where Max is introducing the kids to Nancy, Max has a very small band-aid where Kristin cut him yet the band-aid is on the outer part of his arm by his elbow.
Revealing mistake: During the opening credits, when Kristen turns her clock around to check the time, you can clearly see that the second hand is not rotating, therefore the clock is not working. (00:02:30)
Continuity mistake: When Kristen is in the clinic, and is resisting the sedative, she throws some turquoise items across the room. However, between shots she actually throws these same items twice. (00:11:10)
Continuity mistake: When Kristen is resisting being taken to the isolation room, she holds onto the desk. On the desk beside her is a file box. In the next shot as she is dragged away, the box is gone. (00:58:00)
Continuity mistake: When Nancy is talking to Max about seeing the kids one last time, the front shots show her standing straight up. But the shots from behind she her leaning against the wall. (01:04:10)
Continuity mistake: When Dr. Gordon is trying to sedate Kristen, between shots during the scene, a green cup on the floor, beside the cupboard, appears, disappears, reappears, etc. (00:11:05)
Continuity mistake: When Kristen is building her model house during the opening credits, the can of diet coke sitting on the desk rotates itself between shots to show more of the brand label. (00:03:10)
Continuity mistake: When Neil and Lt. Thompson gets out of the car the front lights switch from on and off between shots. (01:16:00)
Continuity mistake: When Kristen gets up from her bed, after the tricycle rolls into her room, she wears a shirt with no collar. But in the next shot as she walks out of the room, her shirt now has a collar. (00:18:20)
Continuity mistake: When Nancy falls backwards into the chair, and enters Kristen's dream, there is nothing on the chair. When she appears back on the chair afterwards, there's two pillows on the chair. (00:21:05 - 00:21:45)
Factual error: This film begins with a foreboding quote attributed to Edgar Allen Poe: "Sleep. Those little slices of death. How I loathe them." Problem is, Poe never wrote any such thing (and neither did Henry Wadsworth Longfellow), despite decades of misquotes and misattributions across the Internet. So, where did the quote actually originate? The answer is Walter Reisch, lead screenwriter on the 1959 film "Journey to the Center of the Earth." In Reisch's screenplay, the antagonist Count Arne Saknussemm is urged to get some rest, to which he memorably replies, "I don't sleep. I hate those little slices of death."
Continuity mistake: In the opening scene, Kristen gets a spoonful of coffee and as she puts it in her mouth you can see there's no coffee on the spoon.
Continuity mistake: When Jennifer's head goes into the TV, the antennas on top are gone just after Freddie's arms come out of the TV, but in the next shot they are back.
Character mistake: The little girl asks Kristen "what's your name?" Kristen replies "Kirsten". (00:05:59)
Suggested correction: I hear her say "Kristen." The transcript and subtitle even say "Kristen."
