Having greeted a parishioner at the door of the supermarket and bantered for a few seconds I walked firmly off in the direction of where I hadn't parked my car today. I had used a different car park to usual (we are a small town and have five town-centre car parks - go figure).
How good are you at executing the movement which involves a 180 degree turn in a busy public place without giving off the message that you are a jerk? Now I have long since got over being bothered at being thought a jerk but I still find it difficult not to give a brief hint to the rest of the world that this change of direction is deeply considered not lack of foresight. My neighbours will tell you how many times I lock the front door then return for, ooh I don't know, glasses, wallet, mobile, church keys, you name it.
Peter Kay does a lovely impression of a person running for a bus, realising they are going to miss it and changing their physical position to indicate they never meant to catch it at all but were simply jogging for exercise.
We hate having to own up to changing our minds or failing. Why?