I thought there was something fascinating about this.

When I think of the mass of faces I see every day in London, I wonder how many stories I unconsciously tell myself about the people I pass; people I decide I wouldn't have much in common with, people I think look interesting etc. And of course if I spoke to them I may well realise I'm plain wrong.

Anyway, there's something curiously engaging about seeing this process verbalised both ways, by the watcher and the watched.