Marty: Hey, Doc, we better back up, we don't have enough roads to get up to 88.
Doc: Roads? Where we're going we don't need roads.
Doc pulls down his "glasses". Cut to the house, where BIFF comes outside.
Biff: Hey Marty, Marty, I wanna show you these new matchbooks for my auto detailing I had printed up.....
Biff sees the DeLorean's wheels lift up. The car can fly!
Biff: A flying DeLorean?
It blasts off down the street, turns around, and heads towards the camera before disappearing into the future, leaving trails of fire behind in the sky.
Biff: What the hell is going on here?
CREDITS FOR PART 2.
OCTOBER 21, 2015
After the credits we see a skyway with flying cars and floating road signs. The three sonic booms are heard and the DeLorean arrives in the future. Cut to inside the car, where Marty & Jennifer scream. Cut back to the skyway, where we see the DeLorean almost collides with a taxi. In the background is a sign saying "Courthouse Square Exit". Cut back to the car.
Marty: What the hell was that?
Doc: Taxi-cab.
Marty: What do you mean, a taxi cab? I thought we were flying.
Doc: We are.
Marty: Alright Doc, what's going on, huh? Where are we? When are we?
Doc lifts up his "glasses" and looks at the time displays.
Doc: We are descending towards Hill Valley, California, at 4.29pm, on Wednesday, October 21st, 2015.
Marty: 2015? You mean we're in the future?
Jennifer: Future, Marty? What do you mean? How can we be in the future?
Marty: Uh Jennifer, I don't know how to tell you this, but.....you're in a time machine.
Jennifer: And this is the year 2015?
Doc: October 21st 2015.
Jennifer: God, so like you weren't kidding! Marty, we can actually see our futures! (To Doc) Doc, you said we were married, right?