[Muffit]

McCoy: "You really have gone where no man's gone before. Couldn't you tell me what it felt like?"
Spock: "It would be impossible to discuss the subject without a common frame of reference."
McCoy: "You're joking!"
Spock: "A joke . . . is a story with a humorous climax."
McCoy:"You mean I have to /die/ to discuss your insights on death?"
Spock: "Forgive me, Doctor, I am receiving a number of distress calls."
McCoy: "I don't doubt it."
McCoy and Spock, STAR TREK IV The Voyage Home