"Air is probably close enough to wind, and then we just have lightning on top of that. I'd like to see how they work! I could show you a little bit of what I do in exchange." Ninja secrecy only goes so far. Chouji's never been a subtle sort of fighter anyway, and people rarely fail to notice an Akimichi fighting or training. Besides, if Aang is friends with Shikamaru and now with Chouji, that's justification enough.
[Action]
"Air is probably close enough to wind, and then we just have lightning on top of that. I'd like to see how they work! I could show you a little bit of what I do in exchange." Ninja secrecy only goes so far. Chouji's never been a subtle sort of fighter anyway, and people rarely fail to notice an Akimichi fighting or training. Besides, if Aang is friends with Shikamaru and now with Chouji, that's justification enough.