Maurice and Katia Krafft dedicated their lives to exploring the world's volcanoes. Their legacy consists of groundbreaking footage of eruptions and their aftermath, composed in this visual stunning collage.. Sabat MaterTrad. arranaged by Ernst Reijseger. I'm glad Herzog's gone back to making documentaries in the twilight of his career because his films of the 21st century have often been disappointing, while his documentaries continue to wow. His voice is a little more aged here, he's getting considerably older, but he's still got the old magic. THE FIRE WITHIN, which follows the career of a couple of ill-fated vulcanologists via their own filmed footage, is classic Herzog, looking at the darker side of mankind's place in nature. Shades of GRIZZLY MAN and others, then. The footage is astonishingly beautiful, accompanied by wonderfully chosen music and Herzog's thoughtful narration.