I had a nightmare. I was in a room, but I'm not sure where.  There was something scary about the room, although it's hard to remember now.  I think the light wasn't working and it was dark or something, but not completely dark. So I was trying to get out and I ran.  But I went through a series of doors. I was running and pushing each door open, but there was always another just like it. Each door and room was the same.  I woke up in the middle of this, so there was no "end" to the dream.