Alastor Moody: I’ll teach you to curse someone when their back is turned! You stinking, cowardly, scummy… back-shooting…
Minerva McGonagall: Professor Moody! What are you doing?
Alastor Moody: Teaching.
Minerva McGonagall: Is that a…? Is that a student?
Alastor Moody: Technically, it’s a ferret.
From Harry Potter and the Goblet of Fire (2005) | Produced by Warner Bros.