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)
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)
Visible crew/equipment: When Rod is being strangled by the sheet in the jail cell, watch as it goes around his neck and you can see the wire in the sheet that pulls it. (00:42:20)
Visible crew/equipment: When Nancy and her mother take off with the car after talking to Nancy's father, you can see the camera man, the boom microphone, and the whole film crew reflected in the back of the car. (00:45:25)
Visible crew/equipment: When Nancy "jumps" from the boiler room to her front garden you can see her land in a pile of bushes. You don't even have to look closely to see the big black air mattress she lands on. It actually bounces above the fake bushes and becomes almost completely visible. (01:17:00)
Visible crew/equipment: When Freddy falls over the banister onto the stairs near the end, notice the crash mat he lands on. (01:18:55)
Visible crew/equipment: Right at the end of the film, when Nancy's mother is pulled through the front door window by Freddy, you can easily tell it's a dummy. (01:25:10)
Visible crew/equipment: When Nancy's mother is pulled through the door window, a tape marker can be seen on the blue door, above the door handle. (01:25:15)
Visible crew/equipment: When Nancy is in the dream clinic the doctor attempts to give her an injection. As she pushes the doctor away, the bedsheet falls slightly and Freddy's hat can be seen for a couple of seconds. In the next shot, the sheet is above her waist again at which time she reveals that she pulled the hat from her dream.
Visible crew/equipment: In the final scene in Nancy's bedroom, she swings the door open very fast and you can see the camera in the reflection.
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