Have had this recurring nightmare for a very long time... havent had it lately though! The dream takes place in a hospital, at first I'm just walking down empty halls with a feeling of dread, then the lights start to shut off behind me... I start running away from the drakness as I know that there is "something" in it and if it catches me I'm dead or worse... so I run away through the twisting and turning corridors of this empty hospital with the darkness slowly catching up to me, as it gets closer the more decayed the hospital becomes and the more this feeling of utter terror rises in me. The dream ends as i see the exit door at the end of the corridor with light slipping from under it, but as I reach the door and open it only to find concrete wall behind the door, then the darkness envelops me and I wake up, terrified.