In the book, rule number two: The living usually won't see the dead.
5 seconds sound clip from the Beetlejuice movie soundboard.
You can hear this line at 00:12:41 in the Blu-ray version of the movie.
Quote context
[...]
- Uh-uh.
- In the book, rule number two: The living usually won't see the dead.
- God, this book is so stupid. I can't understand anything in there.
- Barb, honey... we're dead. I don't think we have very much to worry about anymore.
- Ah, this is great. This is just what the doctor ordered.
[...]