6. Beware of cursed objects
Enjoyably silly 1987 sequel Hello Mary Lou: Prom Night II offers a textbook example of why you should never, ever plunder creepy old trucks hidden away in your high school. You might unleash the possession-happy ghost of a prom queen who perished after a ghoulish, Carrie-but-with-fire prank 30 years earlier, and is now hellbent on some serious payback.
