...ng Momo. It turns out Sokka was right. Appa did want to eat him.)
"Maybe he's not really sick," Sokka suggested. "This could be some kind of Avatar-illness." Ty Lee's head instantly sported a torch above it (They don't have light bulbs, after all.) "I did notice something was wrong with his aura, but I thought it was just because he felt bad. But it's not unheard of for someone's chi system to get damaged enough to cause physical illness…" "If that's the case, maybe my uncle can tell us what's going on…" Zuko offered. "I'll get on Appa and ask him to come take a look at Aang."
Two days later, Appa landed, carrying his chubby passenger and bearded passenger. "I hear that Aang isn't feeling well. I've seen quite a bit in my time, so I may know what's wrong with him," the old man declared to the group of friends. "Please sir, he's right this way," Katara said, taking Iroh by the arm to lead him to Aang.
"Oh my Spirits… I think… I think I'm going to… HROWAH!" Iroh was splattered with Avatarial chunks. "This is disgusting… But it's more or less told me what's wrong with him. Katara, could you come speak to me in private?"
Katara instantly became worried. What if this disease was fatal? She hurriedly followed Iroh into the kitchen to speak. "Katara… does Aang go into the Avatar state very often?"
Katara had to think about this question… for all of two seconds… Post-war Earth had taken...