“Aiyah, you told me to shut up! One or the other, gongzi! I have a perfectly reasonable amount of caution around threatening people!” And he can’t tell how serious the threat is, so he’s going to make assumptions least likely to get him killed!

Because he can, in fact, be pretty trivially ordered around, he gets his feet under him and stands. Usually people complain about having to look up, not down, but whatever floats Glowy Flying Guy’s boat! Presumably he can go back to flying if he wants to be taller!