I’m surprised he made it alive. It’s an eleven hour flight and most of it at a height of 30,000 feet. That’s a miracle...
If this Kenyan grew up in the Highlands near Kilimanjaro, he might have had the lung structure and the blood RBC content to survive the lower pressure and oxygen availability of the flight in the wheel-well. That is why Kenyan runners do so well in long distance events. They are not cheating but the enviromental circumstances in their upbringing causes a kind of natural blood doping effect when running in races in areas thousands of feet below what they grew up in. Hey...all the more power to them.