Still magic.
For her own part, Cassie just held on, her extra weight sufficient to slow the behemoth aircraft down. She couldn't even begin to imagine what the passengers and flight crew were thinking. Ladies and Gentleman please fasten your safety belts as we're encountering rough sky. If you look out your windows, you'll see a floating magical kid in a cape, a giant green winged monster, and a giant girl's legs. Thank you for flying with our airline. Right. The passengers might do well to ask for ticket refunds after this.
The plane dipped dangerously and then evened out and the boys were actually able to steer the thing back over the airfield and away from the skyscrapers of the city. Over the tarmac Cassie rolled off the plane, growing as she fell, and landing in a sitting position with her legs tucked awkwardly to avoid smashing anything. Gingerly she stood and then reached for the plane to hold it steady in the air. Surely, with her scowl and giant fingers reaching towards them, the people in the plane were reminded of some ridiculous monster flick; Cassie sure was.