Hey, butthead, get away...
2 seconds sound clip from the Back to the Future Part III movie soundboard.
You can hear this line at 01:44:28.229 in the DVD version of the movie.
Quote context
[...]
- Doc, ready, Doc? Catch it! Yes! Yes!
- Well, Doc, it's destroyed. Just like you wanted.
- Marty, I didn't mean to scare you. I didn't recognize you in those clothes.
- What the hell are you doing?
- Just putting on the second coat now.
- Come on, guys. We're gonna be late for brunch.
[...]