A few weeks ago I did that thing when you're out and about and suddenly see someone who you don't want to talk to, and duck into a shop/aisle/behind a tree. I was blithely shopping in a local department store when I suddenly noticed coming my way a girl from high school. You might think 'Why would you not want to say hello to an old school friend?'. Except that she wasn't a friend. She was a bully.
