(Korra, in red training gear, races across a floor with an elaborate dragon painted onto it. She fights a man in similar gear and KOs him with a couple of firebending blasts.)
Korra: [punches air] "WOO-HOO!"
(We cut to a group of elderly people watching. One is dressed in Fire Nation clothes, there are dressed in White Lotus outfits [one's even a woman], and one wrinkly old woman is in Water Tribe clothes... that old woman is an elderly Katara.)
(Korra races up to the sidelines where the old people are watching. She pulls off her helmet gear. Interestingly, the background behind her seems to consist of an elaborate physical training course. Like basic training in the army.)
Korra: (cheerfully) "Hey, why all the doom and gloom, people? We should be celebrating. Three elements down, one to go."
Unnamed Fire Nation elder: "You're getting ahead of yourself as usual, Korra. We haven't decided if you passed your firebending test yet."
Unnamed White Lotus elder: "Ever since you were a little girl you've excelled at the physical side of bending but completely ignored the spiritual side. The Avatar must master both."
(Korra makes a face. She seems like she's heard this lecture before a lot.)
Korra: (normally) "I haven't ignored it, it just doesn't come as easily to me. But that's why I should start training with Tenzin immediately. He's Mister Spiritual."
(Overhead shot of everyone.)
Unnamed White Lotus elder: "Do you believe she's ready, Master Katara?"
Katara: "Yes." (All the others bow they're heads, as if disappointed, or perhaps out of respect.) "If anyone can teach her what she needs to learn, it's Tenzin."
Unnamed White Lotus elder: "Very well, Korra. It's time for you to begin your airbending training."
(Korra grins and starts spinning around.)
Korra: "YESSS! Finally!"
(The elders stare at her.)
Korra: "I mean, *ahem*, thank you all for believing in me."