The last nightmare I had was when I was a little kid. (no joke) A Grape Vine grape chased me around the little theater is my town with a butcher knife. I recently took 3 disco biscuits and about 2 days later, I had a horrible nightmare, I would wake up breathing hard and go back to sleep to return to the same nightmare, it was a trip. I really figure it's just a coincidence, but would a lowered seritonin effect that? I am completly ignorant to the way dreams work.