Aang's not actually going mad, they have him drugged to the teeth, and he gets so out of it he stops eating. And then he goes into withdrawal because the drugs were in the food. I'm not sure what they're giving him, because the exact symptoms don't match any plant or fungus based drugs I know of... Maybe some strange Avatar world plant? He does start to go a bit mad after the withdrawal, though, going into his "get me out of here!" phase.

I'm really glad you like it. It's not my usual thing, but it was a lot of fun... In a deeply twisted way.