Visible crew/equipment: When Dan pulls up in his red truck, before he goes into the restaurant, you can see the crew reflected in the side of the truck. (00:26:45)
Visible crew/equipment: After Freddy 'sucks' Sheila, Freddy says "You flunked", then it cuts to Alice trying to get out from her desk. Under her desk you can see someones fingers briefly. (00:44:25)
Visible crew/equipment: In the scene where the souls are coming out of Freddy's chest, in the first close-up on the bottom left of the screen you can see a man's hand holding a black stick to manoeuvre the little arms. It's real fast but noticeable on standard play. (01:20:45)
Visible crew/equipment: In the scene where Freddy's head is torn, if you play it slowly, you can see a sleeve and wrist coming out of the wall behind Freddy and pull the prosthetic head back. (01:20:50)
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.