Anyone remember in the first Harry Potter movie when Harry and Ron were late for Transfiguration but they thought the teacher wasn't there because there was only a cat? This is the conversation my sister and I had-

Sister: Where's the teacher?

Me: There.

Sister: Where?

Me: The cat!

Sister: What about it?

Me: That cat is the teacher!

Sister: Seriously, who's the teacher?

Me: And I'm being serious!

In the movie, Professor McGonagall turns back into her normal form-

Sister: Oh, the teacher is the cat.

Me: That's what I said!