2015? You mean we're in the future.
5 seconds sound clip from the Back to the Future Part II movie soundboard.
You can hear this line at 00:04:48.570 in the Blu-ray version of the movie.
Quote context
[...]
- What the hell is going on here?
- Taxicab.
- What do you mean a 'taxicab'? I thought we were flying.
- All right, Doc. What's going on, huh? Where are we? When are we?
- We're descending toward Hill Valley, California, at 4:29 p.m. On Wednesday, October 21, 2015.
- 2015? You mean we're in the future.
- Future. Marty, what do you mean? How can we be in the future?
- Jennifer, I don't know how to tell you this, but you're in a time machine.
- God, so, like, you weren't kidding. Marty, we can actually see our future.
- Doc, now, you said we were married, right? Yeah? Was it a big wedding?
[...]