[Interview] Mike P. Nelson on Directing ‘Beware Boiúna’, Jason Voorhees, and Halloween

The ultimate Jaws of snake horror movies will be unleashed when Beware Boiúna slithers into theaters next week, and we talked to the film’s director Mike P. Nelson recently about making an effective creature feature that’s truly scary and based equally on real Amazonian folklore and actual fossils of a giant prehistoric snake found in Columbia, where the film takes place, as well as the challenges and rewards of shooting on location on the Amazon River, creating the snake itself, and more.

In our fun video conversation earlier this month, was also of course talked about Halloween and what it means to Nelson, and we discussed what it meant to him put his own twist on Jason Voorhees in the 2025 official Jason Universe short film Sweet Revenge.

In Beware Boiúna, “Deep in the Amazon, a medical mission spirals into a fight for survival when Boiúna, a colossal ancient predator, awakens to reclaim her domain. In the jungle where nature holds absolute power, she decides who lives and who dies.”

Directed by Mike P. Nelson, reuniting with his Wrong Turn writer Alan McElroy (Halloween 4: the Return of Michael Myers), the film is lead by a powerhouse performance from Kiana Madeira (Fear Street trilogy), along with Jessica Rothe (Happy Death Day) and Logan Marshall-Green (Upgrade).

Beware Boiúna slithers into theaters on October 2.

Watch our full exclusive interview with director Mike P. Nelson, as well as the film’s trailer, below, or listen on the Halloween Daily Podcast.

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