Fucking Gremlins scared the SHIT out of me so bad. About first grade or so, I was just about over the fear. Well, the classes used to meet in a different classroom to study certain subjects, well one day I found a note on the floor. I opened it and read it "Gizmo is hiding in the attic."
I had never told anyone about my fear and only my close family knew. Shit reignited my fear for years!