Dr. Emmett Brown: Then tell me, "future boy", who is president in the United States in 1985?
Marty McFly: Ronald Reagan.
Dr. Emmett Brown: Ronald Reagan? The actor?
[chuckles in disbelief]
Dr. Emmett Brown: Who's Vice President? Jerry Lewis?
Marty McFly: What?
Dr. Emmett Brown: I suppose Jane Wyman is the first lady. And Jack Benny is secretary of the treasury. I've had enough practical jokes for one evening. Good night, future boy.