I said I wasn't a fire ninja because the guys I was with were, so they'd be able to understand what that meant! I didn't know there were all kinds of ninja! Isn't a ninja just a ninja anyway? I get that you're from some different fire nation and all, but a ninja's a ninja where I'm from. Now if you're talking stuff like what nation you're from, I'm from the Water Tribe, all right? So yes, that's cause for not being 'good with fireballs'.

Oh, and there's the fact that the Fire Nation just happens to be on a power-trip for world-domination right now. That might have something to do with it.