Question: What exactly happens to Ronny Cox? Does he get shot by the sniper, does he fall out of the canoe and drown, or does he commit suicide?
Answer: Just like Burt Reynolds says. He clearly yells out "he was shot."
Question: How is it that when Ackers falls in the large body of water (assumingly boiling) in the funnel, he dies - yet Mr. Rogo jumping in to try to help is submerged for many seconds underwater and then climbs out alive and overall, not burned?
Answer: Because he doesn't boil, there's no suggestion that the water is that hot. After Ackers falls in, and while Rogo tries to save him, there are two large explosions in the shaft; we can presume that, while Rogo was able to escape, Ackers was injured/trapped/otherwise incapacitated below the surface, and drowned.
Question: Why did Klaus Kinski try to kill one of the extras with a sword prop?
Answer: Kinski suffered from mental illness for most of his life. He was given to bouts of unprovoked outbursts and violence. He was eventually diagnosed with psychopathy (antisocial personality disorder). On movie sets, he was notorious for being physically and verbally abusive to the crew, who generally hated him. The sword incident was just one of many. On the production of this film, director Werner Herzog carried a gun on him in the event he had to protect himself or others. It was only because Herzog was a long-time friend that he hired Kinski for acting jobs. Kinski was flat-out crazy. He was eventually unable to get any work as an actor.
Agreed. I forget what film set it was but Kinski also once fired a rifle at a bunch of crew members and blew a guy's finger off. He was unstable.
It was also Aguirre, The Wrath Of God. Kinski was irritated by the noises from a hut where cast and crew were playing cards and, out of anger, repeatedly fired a Winchester rifle into it. One of the bullets took the tip of an unknown extra's finger off.
Question: Francisco 'Pancho' Villa was photographed on many occasions, and always had a full head of hair (as well as a moustache). Yet the film cast Telly Savalas as Pancho Villa, who shaved his head, and was always very proud of and conscious of being a Greek-American. The year after Pancho Villa was released Telly Savalas began to play the titular character of the police drama series, 'Kojak', which transformed him into the world's most recognisable Greek. So, my question is, given a film about Pancho Villa was made in Spain, where the producer and director had an unlimited number of actors of Hispanic ancestry to call on, why cast one of the world's most famous bald, Greek actors (sporting an unconvincing moustache) to play the hirsute Mexican Pancho Villa?
Answer: Hollywood, especially in that era, frequently would cast white actors to play people of color The studio knew Savalas would bring in a lot of viewers, while an unknown from Spain might not.
Answer: No wound. Shook his head and dove from the canoe. Refused his life jacket. Just ridden with guilt as he was dead set against burying the hillbilly.
It's ambiguous. In an unused shot from that scene, Drew does grab at his head before falling overboard. Still, I too think he simply passes out from the stress.