Bolin's almost constant amazed expression seems to diminish as Lloyd's own surprise increases, almost as if there's a perfect conservation of shock between the two boys. Perhaps just as much as Lloyd is confused about Avatars and Harmonic Convergence, Bolin is weirded out by being called a Summon Spirit. He doesn't exactly know what that means, but it's got to be one of those spirits from the Spirit World yet?

"No, no, no, it's not... quite like that... whatever that is. It's—my brother and I walked into the Spirit World." He makes a little gesture of fingers from one hand walking on the palm of the other. "See, there's this big pillar of light at the North and South Poles, and when you walk into it, poof!" He raises his fingers up into the air. "That'll take you to the world where all the spirits used to live! But now... we both kind of live in both worlds. Well, it's really more the spirits live in both worlds."