This happened to myself a few months ago. I had gotten to work early, so took a nap on the couch. Fell into a light sleep and the next thing i know, i was in mid-sleep, almost like being caught between two deminsions. I though it was a terrifying dream at first and realized i was awake. It was super freaky, i saw this black shadow figure, and then i felt like i was being dragged off the couch and my eyes were only half open. I woke up freaked out super bad, tried to go back to sleep and it happened again. The experience was very surreal, I never want to go through that again. Needless to say i havent slept in the hospital (work at northside) since then. I never beleived in any kind of spirits or supernatural beings before, but this made me wonder...