Hey, Doc, we better back up. We don't have enough road to get up to 88.
5 seconds sound clip from the Back to the Future movie soundboard.
You can hear this line at 01:51:20 in the Blu-ray version of the movie.
Quote context
[...]
- Wait a minute, Doc. What are you talking about? What happens to us in the future?
- Do we become assholes or something?
- Both you and Jennifer turn out fine.
- It's your kids, Marty. Something has got to be done about your kids.
- Hey, Doc, we better back up. We don't have enough road to get up to 88.
- Roads? Where we're going, we don't need roads.
[...]