Continuity mistake: Just before Nancy goes into her final confrontational dream she sets the countdown on her wristwatch. The closeups are of a chunky watch with a thick strap, but in the long shots she is wearing a dainty pink ladies watch.
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 throws her mother's bottle to the floor she throws it bottom first. When it cuts the bottle lands on its side. With the velocity the bottle was thrown it would have landed bottom first. (00:51:40)
Continuity mistake: When Glenn dies, the blood pours up from his bed. It's seen splashing directly onto the lamp above, though in the next shot after his mother walks in, the lamp has shifted and is completely clean.
Continuity mistake: After Nancy wakes up from her final dream that draws Freddy out, the coffee pot behind her is full of coffee. When Freddy jumps from behind the bed, Nancy runs to a now empty coffee pot and smashes it on Freddy's head.
Continuity mistake: Nancy comes home and there are regular bars on the windows. When she gets to the front door, they change to a heart shaped design. (00:55:55)
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: Nancy and Glen are talking on a bridge and Nancy is holding a book. Glen then takes it from her and reads it's title aloud, and in a closeup he is holding the book closed. But as the shot changes Glen is holding the book so that it is open. (00:53:05)
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: 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: Eventually Nancy goes to sleep in her short-sleeved gown. But when she sets the alarm to her wristwatch, she's wearing a long-sleeve sweater. (01:14:40)
Continuity mistake: Nancy rigs a lamp to explode. However, the one she rigged isn't the one that exploded. It's a completely different lamp. (01:12:20 - 01:22:30)
Continuity mistake: When Nancy goes to the police station in her dream, she looks down at Rod through a window as he sleeps in his cell. The first shot shows him sleeping completely on top of the covers but when Freddy enters the cell, Rod is partially covered with a sheet.
Continuity mistake: When Freddy falls down the stairs there is an umbrella lying down by the door. The umbrella moves between the shots. (01:18:55)
Continuity mistake: When Freddy is set alight, he runs up the cellar staircase which has steps with no backs to them. Then when he is hit by the door and rolls down the stairs, the staircase has changed, and the backs of the steps are there. (01:19:50)
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: At the end of the film the two girls holding the skipping rope chanting the Freddy rhyme swap sides between shots. (01:25:10)
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 Glen sneaks into Nancy's room, she has him turn off the lights and it is pretty dark in her room. When she wakes up to her alarm, it is still night outside but now it is a lot brighter in the room.
Continuity mistake: When Nancy is walking to school, Tina's boyfriend grabs her and he is not wearing a T-Shirt, only his black leather jacket. When she visits him in jail he is wearing a white T-shirt and the leather jacket. When you get arrested they don't let you have a jacket.
Answer: She was not awake. People scream, get out of bed and walk around, and even have conversations while sleeping.