In the scene where Carol-Anne gets lifted up by her own reflection in the mirror, look at her reflection before this. When she gets off her speak and spell toy and slowly moves towards the window, you can obviously tell that the person in the mirror is a stand-in, because she is moving her legs and arms at different times.
When Donna (Lara Flynn Boyle) is putting on her make up in the bathroom before she goes to a "friends house" Carol-Anne pops up and says, "hey, you look great!" and so on. But when Donna comes out of the bathroom and reaches for Carol-Anne's hands, look in the mirror behind Carol-Anne, is that a crew member?
When Tom Skeritt and Nancy Allen are bitch fighting about that, "Evil little brat" watch out after they run up the stairs looking for Carol-Anne. When they come to a stand still in the buildings restaurant, look up at the mirror where Heather runs across. If you look closely enough you can see Heather hiding under the table and chairs waiting for a signal to run!
Contributed by: Paul Rawson England
When Aunt Trish, is sat down in her gallery, she says to her colleague, "Nothing's gonna go wrong huh?" Then the statue's head in her reflection moves. look at Nancy Allen's head (reflection) it doesn't look like Nancy.