"And the wheel," said the Captain, "What about this wheel thingy? It sounds a terribly interesting project."
"Ah," said the marketing girl, "Well, we're having a little difficulty there."
"Difficulty?" exclaimed Ford, "Difficulty? What do you mean, difficulty? It's the single simplest machine in the entire Universe!"
The marketing girl soured him with a look.
"Alright, Mr Wiseguy," she said, "you're so clever, you tell us what colour it should have."
"The Restaurant at the End of the Universe"