[He can't believe it for a moment, but then he practically jumps for joy and runs back to Aang, grabs his hands, and then spins around like a kid who just got a new toy as a gift!]

You can't believe how much this means to me! I've been wanting to be able to metalbend like Chief Toph since forever ago, and I've been trying ever since! Oh MAN, can I not wait to show my brother!?