On The Movie Channel right now (TMCXe) right now is George Romero's Night of the Living Dead ca. 1968.
This movie had a profound effect upon me as a child. I first saw it when I was ~10 years old. I remember I had a friend staying over for a sleepover. The movie came on as a late night horror flick. My dad, two older sisters and me and my friend had no idea what we were getting into with this. The movie truly horrified me. I had a terrible time trying to sleep at night for about a week after watching the movie. To this day I have a kind of love/hate relationship with zombie movies. I'm fascinated by them, but repulsed at the same time. But watching the original source of one of my childhood fears right now, I am far more desensitized to it compared to what it did to me so many year ago (I'm 49 now).
As cheesy as it seems now as I'm watching it, this movie is a true horror classic. Anybody else have a movie that had such a profound effect upon them?