.  If a fire-bender wanted to fly, he'd have to bend the fire beneath his feet while flying. Same with earth-benders riding their air balls or wind-surfing. I actually think it would be easier for an earth-bender, because he's not really making himself fly; he's just levitating the ground beneath him, without having to concentrate on his own movements otherwise.  Anywho, as I recall in Aang's fight with Bumi, Bumi lifted a chunk of rock over Aang's head about the size of the arena they were fighting in. I don't think it's ridiculous to think that he could lift a smaller chunk of earth off the ground with him on it, since I don't think it was every clearly said that an earth-bender has to be on the ground to bend earth. Aang flew in his fight with the Firelord and he had rocks orbiting around him presumably via earth-bending (since they were trying to give the impression that all the elements were under his control at that moment). Granted, he IS the Avatar, but I think it's safe to say that both Toph and Bumi are better earth-benders than him regardless of his Avatar state, so if he could do it then I'm sure that they could too.  If a fire-bender wanted to fly, he'd have to bend the fire beneath his feet while flying. Same with earth-benders riding their air balls or wind-surfing. I actually think it would be easier for an earth-bender, because he's not really making himself fly; he's just levitating the ground beneath him, without having to concentrate on his own movements otherwise.  Anywho, as I recall in Aang's fight with Bumi, Bumi lifted a chunk of rock over Aang's head about the size of the arena they were fighting in. I don't think it's ridiculous to think that he could lift a smaller chunk of earth off the ground with him on it, since I don't think it was every clearly said that an earth-bender has to be on the ground to bend earth. Aang flew in his fight with the Firelord and he had rocks orbiting around him presumably via earth-bending (since they were trying to give the impression that all the elements were under his control at that moment). Granted, he IS the Avatar, but I think it's safe to say that both Toph and Bumi are better earth-benders than him regardless of his Avatar state, so if he could do it then I'm sure that they could too.  