Cave of Forgotten Dreams film clip

Image source: http://wearereplicants.files.wordpress.com/2011/03/cave.jpg?w=640

Link to a clip from the Werner Herzog documentary Cave of Forgotten Dreams:
http://www.youtube.com/watch?v=RcAwlnhRn2g&list=PL8uWDLT-ej-8XR6RzeZCRHQ3UKIOTHg0M