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There's Waterworld, famous for its insanely high production costs and poor reviews (but in retrospect wasn't maybe quite so terrible). There's the Twilight Zone movie that killed its star and two child actors in a helicopter crash.
Pulgasari is a particularly interesting case: North Korean leader Kim Jong Il kidnapped a respected South Korean director and his actress wife to kickstart the North's film industry. It worked, for a time, but North Korea isn't the paradise it's made out to be.
Apocalypse is fairly short, with basically an overview of each highlighted film, but for movie-loving kids it's a good taste of how Hollywood and film making really works.