Last fall I was commuting to work and saw a bike coming from the other direction. As I got closer to it I realized the bike wasn't moving.
As I passed by, I saw the rider was standing up, straddling the top tube . He was dressed in jacket, tights, helmet, gloves and his bike had lights and an orange flag. He looked lost. Or dazed.
I stopped and went back and asked him if he was OK and responded he was fine. I asked if he was lost and he said no. I gave his bike a quick once over and it seemed fine, too.
I did him a good ride and headed off to work. Never saw him again.