Interesting Facts about Aguirre, the Wrath of God

1. In order to get the performance he desired, before each shot Herzog would deliberately infuriate Kinski. After waiting for the hot-tempered actor's inevitable tantrum to "burn itself out", Herzog would then roll the camera.
2. The camera used to shoot the film was stolen by Herzog from the Munich Film School.
3. The low budget precluded the use of stunt men or elaborate special effects. The cast and crew climbed up mountains, hacked through thick jungle, and rode ferocious Amazonian river rapids on rafts built by natives. At one point, a storm caused a river to flood, burying the film sets underneath several feet of water and destroying all of the rafts built for the film. This flooding was immediately incorporated into the story, as a sequence including a flood and subsequent rebuilding of rafts was shot.
4. The soundtrack was composed and performed by German progressive/Krautrock band Popol Vuh.
5. Near the end of the shooting, Werner Herzog thought he had lost all the negatives that the film was shot on. He later discovered that the shipping agency at the Lima airport had completed all paperwork that accompanied the transportation of the film cans, but had not actually shipped them. The cans were thought lost for several weeks before the oversight was revealed.
   
6. To obtain the monkeys utilized in the climactic sequence, Herzog paid several locals to trap 400 monkeys; he paid them half in advance and was to pay the other half upon receipt. The trappers sold the monkeys to someone in Los Angeles or Miami, and Herzog came to the airport just as the monkeys were being loaded to be shipped out of the country. He pretended to be a veterinarian and claimed that the monkeys needed vaccinations before leaving the country. Abashedly, the handlers unloaded the monkeys, and Herzog loaded them into his jeep and drove away, used them in the shot they were required for, and released them afterwards into the jungle.
7. Many of the scenes depicted in the film were unrehearsed and unstaged, and the dividing line between the cast acting in character and simply reacting to their situations as people became very blurry. For example, in one of the opening scenes, when the carriage holding Aguirre's daughter tips over and threatens to collapse, a hand comes in from the right side of the frame to assist the actors in steadying their hold. That hand belongs to director Werner Herzog.
   
8. Aguirre was shot in five weeks, following nine months' worth of pre-production planning. The film was shot in chronological order, as Herzog believed the film crew's progress on the river directly mirrored that of the explorers' journey in the story.
9. Herzog wrote the screenplay “in a frenzy”, which he completed in only two and a half days. Much of the script was written during a 200-mile (320 km) bus trip with Herzog’s football team. During the bus trip, his teammates got drunk after winning a game and one of them subsequently vomited on several pages of Herzog's manuscript, which he immediately tossed out the window. Herzog claims he can't remember what he wrote on these pages.
10. On one occasion, irritated by the noise from a hut where cast and crew were playing cards, the explosive Kinski fired three shots at it, blowing the top joint off one extra's finger. Subsequently, Kinski started leaving the jungle location (over Herzog's refusal to fire a sound assistant), only changing his mind after Herzog threatened to shoot first Kinski and then himself. The latter incident has given rise to the legend that Herzog made Kinski act for him at gunpoint. However, Herzog has repeatedly debunked the claim during interviews, explaining he only verbally threatened Kinski in the heat of the moment, in a desperate attempt to keep him from leaving the set.
11. Francis Ford Coppola's 1979 film Apocalypse Now, a movie based on Joseph Conrad's 1902 novella Heart of Darkness, was influenced also by Aguirre, as it contains seemingly deliberate visual "quotations" of Herzog's film. Coppola himself has noted, "Aguirre, with its incredible imagery, was a very strong influence. I'd be remiss if I didn't mention it."