I had a repetitive nightmare in which I was in an enormous, dark space with a fragment of brick wall in the middle, lit with spotlights. The wall was about 20 feet high and about 15 feet long. peering over the top at me was a huge monster, and when I ran from him, I never knew if he was around the corner of the wall – I would peek around the corner and see him peeking around the other end.
I woke up screaming every night for weeks.