When I was in my late teens, I was hitchhiking up the California coast and was picked up by a girl about my age. We hit it off right way and as it was getting late, decided to pull off the side of the road to sleep on a beach somewhere in Mendocino county.
Some time during the night, I had a horrible nightmare, though. It was almost more than a nightmare, because in it, I had a vision of a balding man wearing a hat perched on the cliffs above us intending to kill us both, and in my dream, my perspective kept shifting from me looking up at him, and he looking down at us.
I awoke with a start, looked up and my travelling companion had the most frightened look I have ever seen. One of us said "let's" and the other said "Get out of here", and we ran back to the car and sped off. Once we got in the car, she told me of HER dream, and in that dream she saw a balding man wearing a hat on the cliffs above us intending to kill us and her perspective kept shifting as well. She had the exact same dream at the exact same time and we kept going over and over it with each other and there wasn't a single detail that was different!
Ever since that time, I have been much more willing to believe in matters spiritual.