Wild Goose Chase

Nothing on earth regularly flies as high as bar-headed geese - they are a natural phenomenon. By any normal criteria their annual migration, right over the top of the Himalayas, should kill them all. As Steve Leonard tries to follow two of them, "Hillary" and "Tenzing", on their journey from mysterious Tibet to the jungles of Nepal, it very nearly kills him too. The geese prove far better at coping with high altitudes and lack of oxygen than Steve does.