Doc:
Tell me, Future Boy, who's President of the United States in 1985?

Marty:
Ronald Reagan.

Doc:
Ronald Reagan? The actor? [rolls his eyes] Ha! Then who's vice-president, Jerry Lewis? I suppose Jane Wyman is the First Lady?

Marty:
Whoa, wait. Doc!

Doc:
And Jack Benny is Secretary of the Treasury!

Marty:
Doc, you gotta listen to me!

Doc:
I've had enough practical jokes for one evening! Good night, future boy! [slams door]