Rincewind has always demonstrated sharp insight.

[The master of self-flattery-through-flattering-others, this one.]

But that is good news! He might have been surprised if you had shown up to my surprise party. [The incongruity apparently did not disturb Chilton.] Actually I would feel rather bad about it, I had already accused him of something quite unflattering, I imagine he wouldn't appreciate too many of my fingerprints on the guest list.