Continuity mistake: Glen is tackled by Rod in the back yard of Tina's house. When he gets up, a grass stain is on the back of his vest, but it's gone when he kisses Nancy. (00:09:55)
Continuity mistake: When the cross falls off of the wall, Nancy rolls over in her bed and stretches her left arm to get it, with her right arm under the covers. Then as the shot changes, Nancy's right arm is resting on the pillow, by her head. (00:11:45)
Continuity mistake: When Nancy lays in bed, she looks up at the wall, just after it has been streched by Freddy. In the wideshot her left arm falls off the pillow, yet in the next closeup it's back on the pillow resting by her head. (00:13:40)
Continuity mistake: When Freddy jumps out from behind the tree in Tina's dream, his glove is on his left hand then it cuts away and back it's now back on his right hand. (00:15:50)
Continuity mistake: Freddy tears open Tina's shirt. When she's being dragged up the wall, its buttoned back up. (00:17:20)
Continuity mistake: When Nancy is by the door, listening to the racket going on whilst Tina's being killed, her boyfriend sneaks up on her, and she says "Oh my God. You scared me." and she grabs her cheek with her hand, and starts to brush her forehead. But in the consecutive shot her hand's down by the wall. (00:17:20)
Continuity mistake: In one scene Nancy's mother is pouring herself a drink, then Nancy enters the room and she switches off the TV. Then Nancy and her mother start talking about going to school, and behind Nancy's mother on the worktop, a white alcohol bottle can be seen. But after their conversation when Nancy leaves, the bottle of alcohol is gone. (00:19:40 - 00:20:30)
Continuity mistake: When the police arrest Rod you see the policeman on the left holding his gun with both hands. When it cuts he holds it with his right hand only. (00:21:50)
Continuity mistake: When Nancy is in class, the teacher walks around the room and we get a good look of everyone in their seats. Then she asks one student to read in front of the class. But the student who gets up and reads wasn't who was sitting there in the previous shot. He is a different person, and is also wearing different clothes. (00:22:15 - 00:23:00)
Continuity mistake: In her dream Nancy burns herself on a boiler pipe, by her wrist. Yet when outside, examining her burn mark, it is up near her elbow. (00:27:00 - 00:28:10)
Continuity mistake: When Nancy is in the bath, Freddy's hand comes out from under the water. Between shots Freddy's hand goes from having no foam on it, to being covered in foam, to having no foam on it once again. (00:30:55)
Continuity mistake: After Nancy gets out the bath, the big mirror goes from having slight condensation on it, to being covered in condensation between shots. (00:32:40)
Continuity mistake: When Nancy gets out the bath, and after her mother leaves, she locks the door then leans back on the sink. Between a wideshot and following closeup, as she leans back, the way her towel and bathrobe are positioned (around her neck) changes. Also, into the wideshot she crosses her arms yet it the closeup her left hand is up by her shoulder. (00:32:45)
Continuity mistake: After her mother leaves, Nancy rests in the bathtub, putting a cloth on her face and leaving her left hand by her left ear. In the following shot her left hand is in the middle of the tub. (00:32:55)
Continuity mistake: After the bathtub scene, when Nancy opens the mirrored medicine cabinet and removes the bottle of Sta-Awake, her fingernails are short as usual, but in the bottle's closeup Nancy's fingernails are quite long. (00:34:10)
Continuity mistake: When Nancy tackles Freddy on her bed, the alarm clock on her bedside table is away from the edge of the desk. Yet in the shot when Freddy and Nancy roll off the side of the bed, the alarm clock on the bedside table has noticeably moved right to the edge so that Nancy can grab it as she falls. (00:40:05)
Continuity mistake: When Glenn is in Nancy's room to wake her up, she awakes from the nightmare, her mother comes to the door and Glenn goes out the window. Nancy shuts the window behind him. After her mother leaves, the window is open. (00:40:50)
Continuity mistake: In the prison cell, just before Rod falls to the floor because notices the sheet wrapping around his neck, between shots the way the sheet is wrapped around his neck changes. (00:42:45)
Continuity mistake: After Rod's funeral where Nancy's mother is about to get into her car, there's a shot of her saying "I'm going to get her some help". There's a gravestone behind her that reads "Coulter". When we see her entering the car, with her relative position unchanged, the gravestone reads "McRenolds" (00:47:05)
Continuity mistake: After Nancy wakes up from her nightmare in the dream clinic, her mother discovers her arm is scratched. The tape that was on Nancy's chin has gone, but returns in the next shot, only to disappear in the next. (00:48:50)
Answer: She was not awake. People scream, get out of bed and walk around, and even have conversations while sleeping.