Night of the Living Dead - the one that started it all! We also saw Dawn of the Dead. Our dad took us to see this around Halloween at a special showing on a Saturday where they scared kids by throwing human sized dummies off the balcony and playing spooky sounds and screams.
Grindhouse theater Return of the Living Dead tombstone shaped poster
David Lynch's Eraserhead (cult film) this movie still to this day makes me laugh and scares me to death at the same time. I don't know if it is the lady in the radiator or the dancing poultry or the larvae baby or the..... It never ends!!