The clip You're a wizard from Harry Potter and the Sorcerer's Stone (2001) with Robbie Coltrane, Daniel Radcliffe
Excuse me, but who are you?
Rubeus Hagrid, Keeper of Keys and Grounds at Hogwarts.
Of course, you know about Hogwarts.
Didn't you ever wonder where your mum and dad learned it all?
You're a wizard, Harry.
I'm a what?
A good one, I'd wager, once you're trained up.
No, you've made a mistake. I mean I can't be a wizard.
I mean, I'm just Harry. Just Harry.
Well, Just Harry, did you ever make anything happen?
Anything you couldn't explain, when you were angry or scared?
"Dear Mr. Potter, We are pleased to accept you at Hogwarts School of Witchcraft and Wizardry."
He will not be going! We swore we'd put a stop to all this rubbish.