Authorities are still investigating the case, but a 16-year old stumbled out of a Hawaiian Airlines flight from San Jose, Calif., to Maui on Sunday, after apparently hitching a ride in the wheel well of a Boeing 767. Officials say he was unconscious during most of the five-and-a-half-hour flight, and is lucky to have survived.
The plane reached an altitude of 38,000 high feet, at which point oxygen is scarce and the brain shuts down, say experts. Without enough oxygen to keep brain cells functioning, people at high altitudes first develop lightheadedness, and, if they don’t receive oxygen, lose consciousness in a matter of minutes.
Here’s what the teen faced, and experts’ best guesses as to how he survived: