Private Eye cartoon: Queue here

This gag is in the current edition of Private Eye. I thought it up while waiting in a slow-moving queue at the bank. It wasn't me doing the tutting or sighing, you understand, I was busy scribbling this down in an A6 notebook that I carry around with me:

Down-time well spent, I'm sure you'll agree! Cartoons often come from real life situations, of course, so it can be problematic when you work at home on your own because you don't connect with the world enough. You have to get out from time to time, to observe people and what they are saying and doing. Even if it is being annoying in a queue.