The Hamster Factor and Other Tales of Twelve Monkeys

The title refers to a production issue in L'esercito delle 12 scimmie (1995), where a hamster in a hamster exercise wheel was used as part of the set decoration. When the hamster refused to perform at the appropriate time, production was halted, causing a relatively simple scene (less than 10 seconds of screen time) to take almost an entire day to film. Curiously, the hamster's presence in the shot is a Plot Hole goof, making this documentary's title even-more poignant.

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Edited from La jetée (1962)