David Learmount, an aviation expert of Flight International, told "BBC" about a lot of ignorance in this area. He suggested that no one would be willing to risk such journey, having full understanding of this kind of ordeal. Stowaways who survived usually traveled relatively short distances or at a low altitude. Two cases are known of people who survived at an altitude of about  – a man on an 8-hour flight, whose body core temperature fell to , and a 16-year-old boy who was unharmed by a 5.5 hour flight, despite losing consciousness. Almost all aircraft stowaways are male.