[Aang knows all too well the last thing Robin remembers, which is worthy of concern. But not an immediate problem.

...He takes about ten minutes setting up the filter. The things he does for his bro.]

I don't remember how much I told you already... but when I first got here, the last thing I remember I was on my way to a meeting with the others, and it was really urgent. But then that time I went home for one night and lived a week back home, that whole emergency ended, and now the last thing I remember is swearing in the air acolytes.