it means shit. Your unconscious mind adjusts to sleep patterns. It can wake you up whenever you believe it can. It has an internal clock, sort of like a mother and her baby. The mother instinctively knows if something is wrong with her child. If the child were to be abducted she would know if he/she was dead or alive.
I had a severe pain in my head at the EXACT time of death of my father in 1998. I doubled over at the KEG parking lot, thought I was having a stroke. I later found out that exact time my father died. The mind can do some amazing things that scientists cannot figure out..Ditch the religion please..