There was a terribly ghastly silence.
There was a terribly ghastly noise.
There was a terribly ghastly silence.

Marvin was humming ironically because he hated humans so much.

The History of every major Galactic Civilization tends to pass through three distinct and recognizable phases, those of Survival, Inquiry and Sophistication, otherwise known as the How, Why, and Where phases. For instance, the first phase is characterized by the question 'How can we eat?' the second by the question 'Why do we eat?' and the third by the question 'Where shall we have lunch?

God's Final Message to His Creation:
'We apologize for the inconvenience.

He would have felt safe if alongside the Dentrassis' underwear, the piles of Sqornshellous mattresses and the man from Betelgeuse holding up a small yellow fish and offering to put it in his ear he had been able to see just a small packet of cornflakes. But he couldn't, and he didn't feel safe.

Marvin trudged on down the corridor, still moaning. "...and then of course I've got this terrible pain in all the diodes down my left hand side..."
"No?" said Arthur grimly as he walked along beside him. "Really?"
"Oh yes," said Marvin, "I mean I've asked for them to be replaced but no one ever listens."
"I can imagine.