This Oscar-winning documentary tells the story behind Japanese daredevil Yuichiro Miura's 1970 effort to ski down the world's tallest mountain.This Oscar-winning documentary tells the story behind Japanese daredevil Yuichiro Miura's 1970 effort to ski down the world's tallest mountain.This Oscar-winning documentary tells the story behind Japanese daredevil Yuichiro Miura's 1970 effort to ski down the world's tallest mountain.