Here’s one of mine, from Alfred Hitchcock’s Rear Window. It’s about one of the most important things economics deals with–incentives. Lisa (played by Grace Kelly) and Jeff (played by Jimmy Stewart), are listening to a man in another apartment play one of his songs on a piano:

LISA: Where does a man get the inspiration for a song like that?
JEFF: From his landlord — once a month.

What are some of your favorites?