From Beyond The Pineal Gland!
In the short story “From Beyond” by H. P. Lovecraft, a scientist creates an electronic device that emits a resonance wave, which stimulates an affected person’s pineal gland. This Pineal Stimulation allowing her or him to perceive planes of existence outside the scope of accepted reality, a translucent, alien environment that overlaps our own recognized reality. It was adapted as a film of the same name in 1986. The 2013 horror film, Banshee Chapter is heavily influenced by this short story.