Half the fun of B-movies with A-budgets is stupid characters bumbling through fantastical scenarios en route to certain doom. Roberts’ Instagram-infographic-as-science approach helps establish his clockwork concept, in which a pet chimpanzee goes bananas on its teenage owners. However, when the film flashes back to 36 hours prior, and begins to focus on its human characters, things begin to drag. The girls just wanna have fun, while Adam is off on his umpteenth book tour, leaving them in the presence of the mysteriously injured primate. This leaves Primate half way between a film that delights in its carnage towards its human characters, and one that tries to induce concern whenever they’re in danger.