Vivi lifts his face with his hands braced against the floor and looks at Aang, his hat shields his eyes just enough for him to appear apologetic - because he is.

"H-hello." He pushes himself up to dust off his pants and readjusts his hat. The motion seems fluid and well practiced to indicate that tripping is just something that happens a lot for the mage. "I hope I didn't disturb you and your friend."

He cants his head towards the little bat in Aang's palm. If other is embarrassed about being caught talking to the critter, he has nothing to fear from the mage.