The Marx Brothers Sum Up Christmas, Cheer Up Siren
Fiorello: What does this say here? This thing here.
Otis P. Driftwood: Oh, that? Oh, that's the usual clause. That's in every contract. That just says uh, it says uh, "If any of the parties participating in this contract is shown not to be in their right mind, the entire agreement is automatically nullified."
Fiorello: Well, I don't know...
Driftwood: It's all right, that's, that's in every contract. That's, that's what they call a "sanity clause."
Fiorello: Ha ha ha ha ha! You can't fool me. There ain't no Sanity Claus.