Humongous opens in 1946, because every horror movie needs a prologue that makes you go, “Oh great, I’m already going to feel bad about humanity before the monster even shows up.” A young Ida Parsons is chased into the woods and raped by some idiot houseguest. Her revenge comes via her dogs, who leap from their pen like tiny, furry lawyers delivering justice, and chew the perpetrator into something less threatening than a character in a slasher film—probably a hamburger. Already, Humongous demonstrates its signature formula: someone dies in a grotesque and slightly absurd way, while the audience is left oscillating between horror, disgust, and, occasionally, laughter at how cartoonishly unlucky everyone is.
Fast forward to 1982. We meet our standard group of young adults: Eric, Nick, their girlfriends Sandy and Donna, and their sister Carla. These kids are dumb. Dumber than a bag of wet hammers. They borrow their father’s yacht and decide that a weekend getaway to Dog Island—a place that would give any sane person a sudden-onset claustrophobia panic attack—is a great idea. They’re the cinematic equivalent of, “Sure, the last five people who came here died, but let’s go anyway!” You could practically hear the horror genre sigh in relief that stupidity remains eternally in vogue.
Things go downhill immediately. They rescue a shipwrecked fisherman, Bert, who might as well have waved a big sign that read, “I will die horribly in 30 seconds.” Bert’s survival skills are non-existent, his luck worse than a coin flip in a hurricane, and yet he feels compelled to share a campfire story about the wild dogs that guard Ida’s island. This exposition scene is priceless because, in real life, it’s the point where you would punch Bert and paddle for shore. But in horror logic, you sit there thinking, “Yes, tell me more about the island’s homicidal canine overseers, please.”
Predictably, the group wrecks their boat and washes up on Dog Island. Nick wanders into the woods because why wouldn’t he? He dies immediately at the hands of a hulking figure, proving that personal space is an outdated concept in Humongous. Donna and Bert fumble around, Bert gets decapitated, and by now you’re questioning why any character hasn’t spontaneously combusted out of sheer terror.
Meanwhile, Sandy, Eric, and Carla stumble into Ida Parsons’ fortified compound, which looks like a cross between a medieval castle, a horror museum, and the set of a rejected Addams Family spinoff. The dogs are all dead, their skeletons serving as an early hint that maybe you don’t mess with someone whose hobby is isolation, excessive hoarding, and not speaking to humans for thirty-five years. In the boathouse, Carla hides under a tarp—because apparently hiding under a blue tarp is a viable survival strategy.
The film excels in exposition delivered through dusty diaries, skeletal corpses, and antique toys. Ida’s diary is a twisted testament to overprotective parenting, insanity, and the perils of seclusion. Her entries about giving birth to a “sick child” who must remain sinless are a masterpiece of horrifyingly misguided logic. By the time Sandy reads them, the audience is simultaneously impressed at the effort Ida put into being terrifying and bewildered that she also managed to invent the blueprint for a sequel no one asked for: Mutant Child vs. Stupid Teenagers.
The mutant son’s introduction is a festival of absurdity. He’s spent 35 years in solitude eating whatever he could kill, which, in the context of Humongous, is mostly dogs. He’s both a physical threat and a walking indictment of every parent who thought “let’s lock him up and he’ll grow up fine” was a good idea. His strength is enormous, his sanity negligible, and his taste in people—specifically anyone who steps on his mother’s property—is lethal. Watching him stalk and murder is equal parts terrifying and laughably over-the-top. There’s something inherently ridiculous about a grown man with the social skills of a toddler and the eating habits of a cannibalistic grizzly bear being the apex predator of a Canadian island.
Eric and Sandy attempt to survive using the oldest trick in the horror handbook: distraction and improvisation. They employ everything from playing pretend (Sandy wraps a blanket around her head and pretends to be Ida—because apparently Ida’s mutant son is susceptible to cosplay) to throwing matches like tiny flares of hope in a sea of absurd death. It’s clumsy, it’s ridiculous, and somehow it works… until it doesn’t. The mutant fatally snaps Eric’s back, Carla is killed, and the island continues its streak of turning bad ideas into permanent ones.
Sandy’s final confrontation with the mutant is both heroic and hilariously dramatic. She impales him with a signpost—nature’s version of a pointy problem-solving tool—and survives. Traumatized, scarred, and emotionally broken, Sandy sits alone on Ida’s dock, looking like a mirror image of the woman who caused this entire chain of horrific, illogical events. She has inherited the legacy of Dog Island: isolation, death, and questionable parenting choices. Watching her, the audience might feel sympathy, horror, or just a strange urge to never go on a weekend getaway ever again.
Humongous is a film that embraces its absurdity with a fervor rarely seen outside of drunk Halloween parties. Its plotting is wild, its logic haphazard, and its kills are gleefully over the top. Characters die in gruesome ways, yet the movie somehow manages to maintain a perverse sense of whimsy, as if saying, “Yes, your friends will die horribly, but isn’t it fascinating how creative murder can be?” The mutant son is an iconic horror figure, not because he’s terrifying in a conventional sense, but because he represents what happens when isolation, poor parenting, and a lifetime of consuming dogs combine into one unstoppable force. He’s a cautionary tale: never neglect your child, never live on a private island for thirty-five years, and for God’s sake, teach them how to socialize.
In the end, Humongous is a movie about bad decisions, bad parenting, and bad survival instincts wrapped in a beautiful, blood-soaked Canadian wilderness. It’s a film where the audience can laugh, cringe, and feel existentially unsafe simultaneously. You leave with a sense of awe at the sheer commitment to chaos and a newfound appreciation for staying the hell off deserted islands. The movie may not make sense, the acting may fluctuate between stiff and melodramatic, and the pacing might resemble a drunk turtle crossing a field, but somehow, against all odds, it is entertaining.
Watching Humongous is like attending a family reunion hosted by a cannibalistic hermit: terrifying, bizarre, and somehow you can’t look away. The mix of grotesque kills, insane backstory, and the Canadian wilderness as a silent, judgmental witness makes it a landmark in low-budget horror. It’s a movie that doesn’t try to be subtle, and if it did, it probably would have killed itself out of embarrassment. Instead, it revels in its own absurdity, leaving the audience with one overriding thought: never trust anyone who says, “It’s just a weekend on a private island.” Because on Dog Island, that promise means death, blood, mutant rage, and the occasional skeletal dog.
By the time the credits roll, you’re left with the eerie realization that horror can be both horrifying and ridiculous in equal measure, and that if you ever find yourself on a private island in Canada, maybe don’t. The mutant son of Ida Parsons, for all his flaws, remains a terrifying symbol of what happens when isolation meets illogical plot devices and a family with questionable judgment. And in that sense, Humongous is a masterpiece of darkly comedic horror, a film that invites you to scream, laugh, and rethink all your life choices—all at the same time.
