Mine was really vivid - I was sleeping on my couch at late afternoon after work. I was so exhausted that I just went fast to sleep. I "woke" up to find myself slipping into the couch through the gap between the seat and back cushions. I was so scared and desperately grabbing at the edge of the seat cushion but the cushion was also falling off on me. Then I "fell". Insteads of hitting whatever was inside the couch, I was "falling" through stars - it was really beautiful and calm feeling there.