I was in stitches when Nathan spoke broken Chinese again. And actually, this attempt is much better than any in Firefly, I could actually understand him! Then said "TV show I used to love" and I yelled back, "TV show you used to star in!"
And no, the sentence he said was never actually used in Firefly. They never used full Chinese sentences in firefly, except to curse and swear.
Well, the one time at the beginning of "Our Mrs. Reynolds" when Kaylee and Mal are arguing. And the bilingual warning message in "Out of Gas."
How do I remember these things? I haven't even thought about chinese in Firefly in years, much less done any reading on it.