Was originally titled The Earthbending Tournament.
This is the second time we see a person in the show with a limited disability. The first time being in The Northern Air Temple
Toph, a blind but powerful Earthbeding girl, joins the team at the end of the episode with the intention of teaching Aang Earthbending
The Boulder: The Boulder feels conflicted about fighting a young blind girl
Toph: Sounds to me like you're scared Boulder!
The Boulder: The Boulder is over his conflicted feelings, and now he is ready to bury you in a rockalanche!
Toph: Whenver you're ready, The Pebble! (laughs)
Toph: What are you doing here Twinkle Toes?
Aang: How did you know it was me?
Sokka: Don't answer to Twinkle Toes, it's not manly!
Katara: You're the one who's bag matches his belt.
The Big, Bad Hippo, an earthbending tournament competitor, is sometimes shown to have four large hippo-like teeth which he uses to crush rocks, and at other times (when his mouth is shut in a grimace, for example) he is shown to have a whole mouth of basically normal looking teeth.