Boy Survives 800-Mile Flight Hanging Onto Plane Wing

Via Rian.ru:

MOSCOW – A 15-year-old boy from the Urals suffered acute frostbite after riding the wing of a Boeing-737 plane on a two-hour flight from Perm to Moscow, Russian radio station Mayak reported on Monday.

After clinging on for the entire 1300-kilometer (808-mile) flight to Vnukova Airport, the boy, named Andrei, collapsed onto the tarmac. His arms and legs were so severely frozen that rescuers were at first unable to remove his coat and shoes, the radio station said.

… Moscow’s air and water transport control department said the radio’s claim was true.

This sounds like a hoax to me. Is this even humanly possible? Even if you were wearing expedition clothing like that of Everest mountaineers, wouldn’t the sudden jolt in altitude be enough to induce fatal altitude sickness?