The scariest movie I ever saw was Invaders from Mars, a film about a boy who sees a spaceship land in the vacant lot behind his house. He sends his parents out the next day to investigate. As they walk across that empty lot suddenly the ground opens up as a celestial chorus begins to eerily sing. Later they return to the house slightly altered.
I was so scared by this movie I never walked through a vacant lot without looking at the ground to make sure it wasn’t opening up. Years later I made an art piece about it.