In The Caller, Mary attends a French class and she sits there with all the other children and is taught my a teacher (John).
But later it is revealed that John died when he was a child and the body was never found. (It was found later behind the wall).
So does it mean that all of it is a hallucination?
Just like she had with George the gardener?
If it is, what about the other children? And the whole class and the things that John mended in Mary's apartment (like the A/C)? Were they real or they too were hallucinations?