Boiúna trailer unleashes giant Amazonian snake Jimothy is in danger

Get ready to brace yourselves, because a colossal threat is slithering into cinematic history. Director Mike P. Nelson, known for crafting intense horror franchises like Wrong Turn and the remake of Silent Night, Deadly Night, is bringing his wild vision to the screen with Beware Boiúna, an Amazonian creature feature set to hit theaters on October 2, 2026.

This isn’t just another monster movie; it’s a deep dive into the raw, untamed heart of the Amazon. The film promises a breathless chase as a team of doctors ventures deep into the Brazilian rainforest along the Curuçá River on a humanitarian mission. But their arrival triggers the awakening of Boiúna, an ancient predator and colossal serpent from local folklore.

Boiúna is more than just a fictional beast. She draws inspiration from Brazilian mythology as the Cobra Grande, a gigantic mythical serpent said to rule the Amazon’s rivers. Her presence grounds the cinematic spectacle in a deep, powerful sense of ancient danger, promising stakes that are both mythological and visceral.

The narrative follows the fate of these intrepid young doctors as they navigate a world where nature holds absolute power, forcing them into a desperate fight for survival against the awakened giant. The story is penned by Alan McElroy, an established writer celebrated for his work on films like Wrong Turn and other genre classics, ensuring a foundation built on tension and suspense.

The marketing campaign has paired this epic tale of jungle terror with a wonderfully bizarre twist. Promotional posters feature some of the internet’s most beloved viral animals—including Jimothy>, Punch the Monkey>, and Moo Deng—only to reveal their fate as meals for the gigantic snake. This tongue-in-cheek approach highlights the central, chilling theme: when Boiúna is hunting, nothing is safe.

Nelson’s pedigree as a horror auteur is undeniable, with his previous work spanning from V/H/S/85 to features like The Domestics. This connection ensures that the raw intensity and atmospheric dread of Beware Boiúna will be delivered with expert precision.

Beware Boiúna is a production brought to life by Constantin Film and JB Pictures, with producers Robert Kulzer and Jeremy Bolt steering the project. With a stellar cast featuring Kiana Madeira, Jessica Rothe, and Logan Marshall-Green, this film promises to be a spectacular collision of cinematic horror and mythic danger. Mark your calendars; the Amazon awaits its giant serpent.