Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
High Octane Nightmare Fuel: The Faculty
Miss Burke's decapitated head sprouting tentacles, then crawling back to and reattaching itself to its body, which is still walking around.
Principal Drake getting up after being shot, with a bunch of little parasites crawling out of the bullet hole in her head.
Ditto her Impaled Palm and subsequent chase through the darkened school by the coach.
Marybeth's transformation into her alien form, her arms turning into Combat Tentacles and her head melting into her body, then turning into one ugly motherfucker that looks like the Predator.
Mrs Brummel in the shower with her skin peeling off, and moaning for help. Made even more gruesome when patches of hair come away, with mushy scalp included.
