[Bartimaeus revels in the sound of an offended magician, sorry. Well, mage. Whatever title they are masquerading around under.

He also revels in another bout of laughter.]

What a ridiculous joke! Are you trying to moonlight as a comedian?

A mage that doesn't want to rule the world. When pigs fly.

[A pause as he thinks about that.]

When pigs fly without being loaded into a catapult or imitated by a spirit of any sort.