OK, so I'm just messing around here, and managed to pull up an image on Google that used to scare the bejezus out of me....
My brothers, like most kids had a collection of baseball cards and other stuff. One day I was looking through them and saw they had slipped some trading cards from "the Outer Limits" in there....I was cool until I saw this one....
(the guy on the left)
JESUS! DAMN! OH MY GOD!
I threw the cards down, but couldn't resist going back dozens of times to peek at what scared me so. I used to see that face when I closed my eyes at night.
I had completely forgotten all about it, but it all came back to me.
What scared the hell out of you as a kid, but you had to keep going back and experiencing?