It was a really hot, oppressively hot day, and I was heading home slowly via Regent's Street, which was heaving with shoppers, mostly tourists. I followed this girl, not just as a stalker, but because we were headed in the same direction, but I was fascinated with her backpack & her cool attitude. I never saw her face.
Until a bit later, when I emerged onto Picadilly, and there she was, walking towards me. Smile! You're dotted.