Factual error: When Glen and Nancy are talking on the bridge, you can see huge palm trees in the background. Though this was filmed in California (hence visible palm trees at the cemetery), the fictional Springwood is supposed to be in Ohio - they show the location of Springwood on a map at the start of 'Freddy's Dead, the Final Nightmare', and there's no other conflicting in-universe location given within the series. So it's established as Ohio, but there are no palm trees in Ohio. Other California "hints" add to the mistake, such as CA license plates, etc. (00:01:00 - 00:43:22)
Revealing mistake: Near the beginning, during Tina's first dream, Tina gets cornered in front of one of the furnaces. She steps forward and Freddy jumps out from behind her and scares her. When she steps forward, Freddy (who is trying to lean down out of the shot) is seen stepping sideways to position himself to scare Tina. (00:03:20)
Visible crew/equipment: When Glen walks through Tina's backyard to investigate the noise, right after the bushes rustle when he says "Kitty kitty," the camera progresses forward, and the leg of a crew member is visible for a second at the bottom right hand corner of the screen. (00:08:50)
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)
Visible crew/equipment: This is during the part where the girl dies in the bedroom with her boyfriend (where she gets dragged up along the roof). Just before, when you see the marks made by Freddy's glove, and her hands come up to show her pain, she clearly grabs a chunk of the thin latex pad (easier in slo-mo but not vital). (00:16:35)
Audio problem: When Tina is being attacked by Freddy Krueger just as she is trying to open the door to her house, she yells, "Nancy. Open the door. Nancy.", but her lips do not match with what she is saying. (00:16:50)
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)
Revealing mistake: During Tina's death scene before she is lifted into the air, you can see the wire attached to the right side of her waist. (00:17:25)
Revealing mistake: During Tina's death scene before she is lifted into the air, you can see the wire attached to the right side of her waist. (00:17:25)
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)
Audio problem: When the police pull up and run over to arrest Rod, he says "I'm cool, I'm cool!" His mouth doesn't move when this is said. (00:21:45)
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)
Audio problem: When Rod Lane runs away from Lt. Thompson, who is trying to arrest him, Lt. Thompson yells "Hold it," but his lips did not move. (00:22:30)
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)
Answer: The scene you are referring to is a dream sequence. In dreams everything is different and how they change throughout the movie is no mistake.
SAZOO1975