[Tony was used to being argued with, but he was also used to being right. Even when he was wrong. At least Korra pulled up without crashing, though. He righted himself and hovered next to her.]

Your glider couldn't handle jets. If we stuck jets on it, you'd need a plane to withstand the force. What you need is to brake.

[That wasn't the best explanation, but he was trying.]

Your glider moves horizontally. You can pull up to decrease speed, but you'll always be going forward. You've seen birds fly, right? You're a big bird. Move downward in a spiral to drop altitude.

[Airbending was a great advantage. He found that out when Korra started using hers to slow her descent.]

Huh. Not bad. Maybe we will get you a plane.