Okay. People are in his head, parasites are taking over peoples' minds, and Zuko is having a conversation with a blue-furred horseman. Manhorse? Wait, scorpionhorse? Scorpionhorseman? Manscorpionhorse. IT'S BLUE.

In any case . . . longer explanations probably aren't going to make any of this make any more sense, so Zuko just nods, and looks around for something a bit more familiar.

"Has anybody seen Mai? Is she all right?"