The clip norman discovers the truth Part 2 from Psycho II (1983)
It's my mother.
She's not dead.
How do you know that?
I've seen her, up in the window.
You saw her, too.
That was Mary Loomis
or Lila Loomis dressed up to look like your mother.
What about the phone calls?
Mary Loomis again.
But she's been with me when the phone rang.
Then it was her mother.
My mother spoke to me. Downstairs.
Do you remember now our discussions about your mother?
Once you accepted the fact that you murdered her,
her memory would have no hold over you.