The Exorcist1973

Karras:
Hello, Regan. I'm a friend of your mother's. I'd like to help you.

Regan:
[possessed voice] You might loosen these straps then.

Karras:
I'm afraid you might hurt yourself, Regan.

Regan:
I'm not Regan.

Karras:
I see. Well then, let's introduce ourselves. I'm Damien Karras.

Regan:
I'm the devil. Now kindly undo these straps!

Karras:
If you're the devil, why not make the straps disappear?

Regan:
That's much too vulgar a display of power, Karras.

Karras:
Where's Regan?

Regan:
In here - with us.

Karras:
Show me Regan and I'll loosen one of the straps.

Regan:
[in the voice of a bum he saw on the subway] Can you help an old altar boy, Father?... [possessed voice] Your mother's in here with us, Karras. Would you like to leave a message? I'll see that she gets it.

Karras:
If that's true, then you must know my mother's maiden name. What is it? What is it?

[Regan vomits onto Karras]