The Marx Brothers and Christmas

What would Christmas be without the Marx Brothers and a long legal document?

From the movie, A Night at the Opera:

CHICO: Hey, wait, wait. What does this say here, this thing here?
GROUCHO: 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 are shown not to be in their right mind, the entire agreement is automatically nullified.
CHICO: Well, I don't know...
GROUCHO: It's all right. That's, that's in every contract. That's, that's what they call a sanity clause.
CHICO: Ha-ha-ha-ha-ha! You can't fool me. There ain't no Sanity Clause!

YouTube has the scene.

Merry Christmas.