"Nothing of my own to add but wasn't there a famous post about a poster seeing herself in the past and future? As a child she had looked out of her bedroom window to see a strange woman in the garden. Then as a grown woman she was back at her childhood home. She was in the garden and looked up at her old bedroom window to see herself as a child looking back."
I remember that one. I also remember a similar one told by another MNer. When she was in her early 20s she and a group of friends had just left a nightclub and were waiting for a taxi, she felt they were being watched and noticed a woman, probably in her 40s, on the other side of the road staring at them. Then when she was in her 40s she was walking home late one night down the road that the nightclub she used to go to was in - she noticed a group of 20-something women outside the nightclub and saw her 20 year old self looking at her.