As a fan of both authors I'd just like to point out the quote is from Douglas Adams, The Restaurant at the End of the Universe.
I've never really thought about it and I don't have the vocabulary to describe it, but they have similar humour in the way they look at humans and social interaction.
Likewise in one of the later books they visit "God's last message to the universe" or something like that and if I recall correctly it's "Sorry for the inconvenience"
I was listening to the audiobook and had tu de cypher it by writing onto the paper. Almost shat myself laughing when I realize what it said. You will be missed Douglas.