I had a really bad experience at the supermarket yesterday - you know, it's a busy time of day, lots of shoppers filling their trolleys beyond the 12 items 'serve yourself' threshold and there are only two checkouts open. I was the third trolley in one queue and there were similar numbers in the adjacent checkout. You could tell the poor checkout operator was frustrated about the queue forming and the fact that noone was doing anything to get another one open to serve the c