[And soon enough, Aang approched the bridge, riding that ball of air that he called an air scooter. He looked cheery despite feeling somewhat uneasy about Katara's sudden message. Was something up with that Tobi guy? He seemed really friendly. Aang hopped out of the air scooter several yards from Katara and calmly strolled up to her. And he says]

Hey! What's going on?