[Sokka waits for Katara's explanation as he realizes he's breached some line of defenses that she hadn't expected him to pass through. Nevertheless, he listens (mostly) without interruption, though he will take a brief moment of pause to inject,] Ah, the burden of being the idea guy, [though those words are more to himself than to Katara.

[But at least, we're finally to the story of how Zuko was poisoned. And so now Sokka straightens himself and focuses upon his sister recalling the story as best she can. Granted, it's nto a long story, but it still gets Sokka thinking.]

A poisoned weapon? [Sokka asks. That's what she seems to be describing.] Though it is curious. I'm not exactly an expert at poison, but I've always assumed poison was more about killing someone than making them act all goofy. [Because, yes, that's how Zuko was acting: goofy.] How many are infected?

[Still, his sister's mind is troubled, though he can't say if it's that or something more. He doesn't know which is the case, but Sokka has noticed that she's been acting funny the entire time here. She's usually not so reserved; of course, she has been through quite a lot, physically and mentally it seems, but she's usually not so closed off into herself. Sokka puts a gentle hand on her blanket-covered arm, being much more careful not to hurt her this time, and he looks deep into her eyes, trying to show his support.]