www.youtube.com/watch?v=
Though I find it hard to believe, this trailer actually aired in 1950s movie theaters before horror flicks to hypnotize the audience into being scared. I love the electronic music and how the hypnotic swirls look as the announcer intones:
It's worth listening to the whole four minutes because it only gets more and more demented, with references to hallucinations and undefined "weird experiences." Did filmmakers actually believe this trailer would hypnotize and terrify audiences? Hard to say. The 1950s were a wacky time.