Continuity mistake: At Rick's funeral, Debbie gives Alice her spike bracelet. The spikes are flat and there aren't that many of them, but at the end when Alice is getting decked out to fight Freddy she pulls the bracelet out of her drawer, and the spikes are very menacing looking and there are more of them. (00:55:25 - 01:13:20)
Continuity mistake: When Sheila's pen bleeds, she puts the pen down, then smears the blood around her physics test. Between shots, the way the blood has smeared changes. (00:42:45)
Revealing mistake: When Alice is being blown towards the cinema screen, she grabs hold of one of the cinema chairs. You can clearly see she is actually holding a handle which is on top of the chair. This is blatantly visible when she lets go of it and flies off. (01:01:35)
Continuity mistake: When Kristen meets the little girl drawing the chalk house, between the two shots before it starts raining, the chalk drawing changes. (00:02:35)
Continuity mistake: After Kristen first falls into the quicksand, the shot changes, and a palm tree appears which wasn't there before. (00:34:35)
Continuity mistake: When Kincaid's dog runs under the bed, it kicks a carpet away from the bed. Beside the bedpost there is a white sock. When it cuts, the sock has moved onto the carpet. (00:05:15)
Continuity mistake: When Freddy is pushing down on the weight Debbie is holding, in one shot Debbie is holding the middle of the weight with both hands, then when the shot changes she is holding the weight with one hand either side. (01:06:10)
Continuity mistake: When the nib of Shelia's pen starts bleeding on her test, the pool of blood on her paper moves between shots. (00:42:30)
Continuity mistake: When Alice is in the cinema she has a drink of coke. The Coke has a plastic lid on it. But when Alice turns around to investigate the strong winds, there is no plastic lid on the Coke. Then in the next shot the plastic lid is back on it. (01:01:10)
Answer: As Kristin was being burned to death in the boiler, she passed her ability to pull other people into her dreams to Alice. This enabled Freddy to get new victims.