>I know one that does. That guy at the client had a sound (on program error) in his computer that had a C3PO voice saying "you malfunctioning little twerp". :-)))

Now there's an idea. Why not go all the way, and design an entire UI based on a Monty Python sketch:

MessageBox: "Do you want to delete this record?"

User clicks Yes.

MessageBox: "Shut your festering gob, you tit! Your type makes me puke. You vacuous toffee-nosed malodorous pervert!!

Use clicks on "Look! I came here to delete a record!"

MessageBox "No, you didn't"

User clicks on "Yes, I did!"

And so on...