“Invaders from Mars. I first saw this 1953 movie when I was a child, and it scared the Bejeezus out of me. Implants in the back of the head? And that creature in the globe!”
That one gave me nightmares when I was young. Another one that scared me to death as a child was Earth vs. the Flying Saucers. I first saw the previews at the drive in, and it scared me so bad my parents refused to take me to see the movie!
I forgot the name of that one! Scared the pants off of me particularly when my older brother pretended to be one of them.