Come on, insisted Zaphod, I've found a way in.
In? said Arthur in horror.
Into the interior of the planet! An underground passage. The force of the whale's impact cracked it open, and that's where we have to go. Where no man has trod these five million years, into the very depths of time itself ...
Marvin started his ironical humming again.
Zaphod hit him and he shut up.
With little shudders of disgust they all followed Zaphod down the incline into the crater, trying very hard not to look at its unfortunate creator.
Life, said Marvin dolefully, loathe it or ignore it, you can't like it.

Douglas Adams