Keep on knocking, but you can't come in
5 seconds sound clip from the Cheech and Chong's Up in Smoke movie soundboard.
You can hear this line at 00:16:56 in the Blu-ray version of the movie.
Quote context
[...]
- Keep on knocking, but you can't come in
- Don't, man. It's the cops, man.
- Wait, I gotta roll down the window, man. Here you go.
- Weigh the anchor. How much does it weigh? I don't know. I forgot. You forgot?
- Can I see your license, sir?
- What?
- Your license. Where's your license?
[...]