Harry Potter: Hagrid, who gave you the dragon egg? What did he look like?

Rubeus Hagrid: I don’t know, I never saw his face. He kept his hood up.

Harry Potter: The stranger, though, you and he must have talked.

Rubeus Hagrid: Well, he wanted to know what sort of creatures I looked after. I told him. I said, “After Fluffy, a dragon’s gonna be no problem.”

Harry Potter: And did he seem interested in Fluffy?

Rubeus Hagrid: Well, of course he was interested in Fluffy. How often do you come across a three-headed dog, even if you’re in the trade? But I told him. I said, “The trick with any beast is to know how to calm him.” Take Fluffy, for example. Just play him a bit of music and he falls straight to sleep. (the trio looks at each other) I shouldn’t have told you that. Where are you going? Wait!

From Harry Potter and the Sorcerer’s Stone (2001)