Let's put her in the swing. Then I'll take you home, and you can come back in your truck and wake her.
5 seconds sound clip from the Back to the Future Part II movie soundboard.
You can hear this line at 00:39:14.195 in the Blu-ray version of the movie.
Quote context
[...]
- Better that I devote myself to studying the other great mystery of the universe: women.
- Marty, Einie, brace yourselves for temporal displacement.
- Did we make it? Are we back?
- Wait a minute. We're just gonna leave her here on the porch?
- The disorientation will help convince her that it was all a dream.
- How long do you think she's gonna be out?
[...]