A shipwrecked sailor washed ashore on a desert island. He found a bottle half buried in the sand he pulled the cork. Nothing happened. It was empty and he slowly starved to death.
Anti-humor is a type of indirect humor that involves the joke-teller delivering something which is deliberately not funny, or lacking in intrinsic meaning. The practice relies on the expectation on the part of the audience of something humorous, and when this does not happen, the irony itself is of comedic value.