Has anyone here ever seen someone else who looked like themselves? It's happened to me several times... and it was always while I was driving a car, unable to stop or slow down with traffic around me, and each time, the other person saw me, too, and we stared at each other in surprise. I've even had one person wave his hand at me. It's always a strange feeling...
There was a Polish film that came out about 15 years ago called
The Double Life of Veronique,
http://www.imdb.com/title/tt0101765/ and there's a scene where the two Veroniques catch a glimpse of each other, one while standing in a town square, and the other on a bus as it was making a turn, and for a few seconds, the two women, try to keep their eyes on one another as the bus turns... It's an eerie scene...