The Invisible Maniac (1990)

The Invisible Maniac is the kind of proudly disreputable midnight movie that knows exactly what it is: a scrappy, low-budget cocktail of mad-scientist sci-fi, slasher horror, and raunchy comedy that plays like a live wire. Adam Rifkin leans into the schlock with a wink, staging invisibility gags and outrageous set pieces with the gleeful momentum of a B-movie determined to “deliver” on every lurid promise in its title. If you miss the era when genre films felt unfiltered and slightly dangerous—more grindhouse than prestige—this one scratches that itch with brisk pacing and an anything-goes attitude. Fair warning: the R-rating is earned, and the heavy nudity and sleazy humor will be a dealbreaker for some, but for the right crowd it’s an enjoyably shameless slice of trashy fun.

The Invisible Maniac is clearly trying to mash up mad-scientist sci‑fi, sleazy teen sex comedy, and splattery slasher mayhem into one trashy midnight-movie package. The problem is the “invisible” gimmick is mostly an excuse for cheap effects and cheaper setups, and the tone lurches between goofy and nasty in a way that can feel more grubby than funny. If you’re hoping for clever satire, strong horror craftsmanship, or even a well-paced B-movie, this will likely come off as clumsy, repetitive, and more interested in nudity than tension. That said, if your bar is “so-bad-it’s-brazen” and you’re specifically in the mood for low-rent, R-rated schlock with a few absurd kills, it delivers exactly that and nothing more.