Braindead
When a Sumatran rat-monkey bites Lionel Cosgrove's mother, she's transformed into a zombie and begins killing (and transforming) the entire town while Lionel races to keep things under control.
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Braindead (1992) is a comedy, horror movie running 1h 43m. Starring Timothy Balme, Diana Peñalver, Elizabeth Moody. Rated 7.4/10 on TMDB. Watch it online free on ZapFlix.