It’s the middle of the night. You wake up with a start. There’s a presence in the room watching you. You sense that it is evil. But you are paralyzed and powerless. It’s your worst nightmare – Or is it? Radio Netherland's Michele Ernsting explores the strange and surprisingly common condition of sleep paralysis with Dr. Al Cheyne, a leading expert on the subject and several victims of “night frights. Inspired (in part) by The Nightmare, the 1781 painting by Henry Fuseli.