Your film is like your children. You might want a child with certain qualities, but you are never going to get the exact specification right. The film has a privilege to live its own life and develop its own character. To suppress this is dangerous. It is an approach that works the other way too: sometimes the footage has amazing qualities that you did not expect. -Werner Herzog
Klaus Kinski was a major source of tension on set, as he fought virulently with the crew and raged over trivial matters. The natives where very up set about his behavior. Herzog has claimed that it went so far that one of the chieftains offered, in all seriousness, to murder Kinski for Herzog.