I think it would be nice if you all dropped him a line.
5 seconds sound clip from the Back to the Future movie soundboard.
You can hear this line at 00:14:58 in the Blu-ray version of the movie.
Quote context
[...]
- He's absolutely right, Marty.
- The last thing you need is headaches.
- Kids, we're going to have to eat this cake by ourselves.
- Your Uncle Joey didn't make parole again.
- I think it would be nice if you all dropped him a line.
- Yeah. I think it's a major embarrassment, having an uncle in prison.
- We all make mistakes in life, children.
[...]