The Festival's started

I nipped into the Fringe Box Office to pick up some tickets this afternoon. Was in a bit of a hurry so almost made the mistake of walking in to the middle of a street performance. I had my head down and suddenly became aware that the way ahead was clear, no people in front of me - but it was because I'd walked into the circle in which a canadian busker was doing her thing.
Luckily I was able to return to the crowd quickly without being noticed.