Have you ever?

Have you ever been walking along, in a world of your own, only to realize that you are walking in totally the wrong direction?

Yes, I think we've all done it, but what do you do when you notice?

Do you just turn around and walk the other way? Or do you look to see if anyone is looking first, so that you don't look silly?
 
Some people look at their watch, and then turn around, pretending that they are supposed to be elsewhere.

Others do the decoy ploy, stop to 're-tie' their shoelace, then do a quick turn around so that nobody will notice.

Others check the contents of their bag, as if they have forgotten something before 'going home' to get it.

Yet others make the grand gesture - stop stock still, getting in everyone's way in the process, slap their head with their palm mutter loudly about how stupid they are and then turn around.

But, at the end of the day, does anyone notice if we've gone the wrong way, does anyone care? No, they don't. So why do we do it?