WACKO

Dick Harbinger is a police officer. Thirteen years ago, on Halloween, a man wearing a pumpkin head and driving a lawnmower murdered several children. Everyone is a suspect. The school janitor, Zeke, is brought in for questioning. The father of the family is also a suspect and is questioned by police. His daughter, Mary, has caught him on multiple occasions trying to peek at her either while in the shower or while she was asleep. Mary's friend Rosie is dating Tony "the Schlong" Schlongini. He, along with many others, was killed by Mr. Pumpkinhead.

In the end, the detective dresses up as the Lawnmower Killer because no one is taking the threat seriously. 13 years ago, Mary Graves' older sister was murdered on Halloween prom night by a power-mowing maniac. Since then, Mary has experienced horror, sexual frustration, and psychoanalysis, but she still sees little lawnmowers everywhere. After 13 years, the pumpkin-headed killer was planning to return. However, an obsessed cop tried to stop the plan.

At times, Harbinger's family all sit and eat cake at the dinner table. Baker also fills his suitcase (which has a tap on it) with coffee and later murders Vice Principal, Harry Vice. Harry likes to "clamp on down" on student slackers, but he ends up having his head clamped in a vice, courtesy of Harbinger.

Detective Dick Harbinger dresses up as the Lawnmower Killer to scare the town into taking the threat seriously, revealing himself as the killer to teach everyone a lesson and concluding the cycle of suspicion and absurdity.

The ending flips the slasher formula by making the obsessed detective the source of the chaos, parodying genre conventions where authority figures are both protectors and threats. This twist brings the film’s satire full circle, exposing the town’s paranoia and the futility of overzealous vigilance in a world where everyone is a suspect and nothing—not even murder—can be taken seriously.