14. No One Knows
Once, when I was driving to see a girl during her overnight shift at a local hospital, I experienced a non-substance-related blackout. The last thing I remember before the incident was driving toward a four-way stop in the middle of a residential area. When I came to, my truck was in park and running with the driver door open in the middle of the intersection, my shoes and socks were off and scattered on the ground next to the driver’s side door, and I was in the middle of a middle-aged woman’s yard about 40 feet away. She was screaming at me from her front doorstep, yelling “WHAT IS WRONG WITH YOU?!” and standing with a child behind her as if I was a threat (which I am absolutely sure I appeared to be). I apologized fervently and drove straight home after collecting my socks and shoes. I have absolutely no recollection of the events during the blackout, no idea how long it was, and still have no clue as to what caused it or what it actually was.
That is the single-most terrifying thing that has ever happened in my life. This was about a year ago and I still think of it several times a day.