This wacky short was used in Steve Martin's live comedy act. Watch as a couple receives the worst service ever, with the best payoff.
This short was nominated for an Academy Award and was included in a VHS release of Steve Martin's work, but has yet to make it to DVD in any form. It's available on YouTube, uploaded by thewilfs1.
Obscurity factor: 8 (known to Martin fans, but not generally well known otherwise, on YouTube)