The Strange and the Beautiful: “It takes a while to figure out why Dr. Mark Mahowald’s grainy sleep-lab videos are so spooky. One immediate reason is the phenomena on the footage — a class of disorders called ”parasomnias,” which are defined as unwanted and involuntary behaviors during sleep and are by definition occult, because they appear when most people are unable to witness them. But even the scientists who stay up late by profession never quite get used to what they see.” NY Times