Yossarian (Alan Arkin): Ok, let me see if I've got this straight. In order to be grounded, I've got to be crazy. And I must be crazy to keep flying. But if I ask to be grounded, that means I'm not crazy anymore, and I have to keep flying.
Doc Daneeka (Jack Gilford): You got it, that's Catch-22.
Yossarian: Whoo... That's some catch, that Catch-22.
Doc Daneeka: It's the best there is.