Shopping in Tesco today for the office coffee (review to follow!), I went to the self-service checkouts as I only had 3 items.  So, there are 2 checkouts on the left and 2 on the right separated by a desk with a woman who watches the progress of the 4 checkouts in case something goes wrong.

I got in the queue for the left hand pair and a woman and a man were queing on the right hand side. Not between the 2 pairs, definitely for the right hand pair.

Woman: Excuse me, the queue's here!

Me: Sorry, I thought you were queing for the ones on that side.

Woman: No, you get in the queue for whichever one's free first.

So I did, as I didn't want to cause a scene.

I thought "I know where you spend most of your time queing: McDonalds".  Whoever heard of queing like that in a supermarket?  WITCH!

Anyway, even waiting behind here and the other bloke I still beat them both through.