It catches on the air currents! They're always there, you know, even if most people don't notice 'em. Birds always do, and if you're an airbender, you have to learn to do it, too. I sometimes need to bend the air a little, but not too much.

[ After a brief beat, she realizes "bending" might need explanation. ]

Oh, bending's from my world. It's like - Lee thought it was wind jutsus, but it's not. Here, I'll show you.

[ And with little warning, Ikki shuts the glider behind her, going into free fall for a few precious seconds before swinging it around in front of her, blasting air downwards. The blowback makes her clothes flutter, and she laughs cheerfully as she hovers for a second before sliding into a fall again, neatly snapping the glider back open.

It only takes a second to drift upwards again, easy as pie. ]

See? No hand-seal things.