You can't rent a car with shower curtain rings, Del.
5 seconds sound clip from the Planes, Trains & Automobiles (1987) movie soundboard.
You can hear this line at 01:05:13 in the Blu-ray version of the movie.
Quote context
[...]
- They're going to be happy as pigs in shit to see you.
- How could you rent the thing anyway without a credit card?
- I mean you couldn't. How could you do it?
- I gave this gal behind the counter a set of shower curtain rings.
- You can't rent a car with shower curtain rings, Del.
- Well... somehow your... diner's club card wound up in my wallet, and I just...
- No, I swear on my life I didn't.
- You stole my card and then you rented a car, and then you burned it up!
[...]