This has happened to me a few times in my life. One time at college, I found myself in the cafeteria not knowing what time it was and how I got there, and not remembering the entire day. Another time I was unaware of where I was, what I was doing there, and what I was looking at. I looked down and found keys in my hand wondering what I was doing with them. I then saw in front of me a car that I did not recognize. This lasted several minutes, Then it quickly went away. I was in a Denny’s parking lot in front of my own car. I had just come outside to go home.