A question about the ending *POSSIBLE SPOILERS*
The thing that confused me, is that one minute the mother is in the elevator with her daughter in her arms (after she picks her up from the bathroom floor),
the next minute (when the elevator door opens) she watches her daughter coming out of an apartment towards her, and the ghost girl is in the elevator with her.
How did this 'switch' happen?
Was that the ghost girl on the bathroom floor, pretending to be her daughter?
Great movie by the way!