Revealing mistake: In the beginning when Mrs. Meers goes into the elevator, you can see that the elevator floor is a continuation of the room floor, just with a strip across it.
Revealing mistake: When Jimmy and Millie are sitting on the ledge of the building she works in, Jimmy leans forward, and the top of his head disappears - or actually fades into the background.
Revealing mistake: Jimmy and Millie are sitting on the ledge of the building and stand up. When Millie is about to fall and waves her arms the left one becomes semi transparent and merges with the background.
