It was a lovely summers day, and - as is often the case when the sun is beaming strongly - I found my mood to be one of effusive happiness.  I jauntily bounced along to my place of business, finding pleasure in every little quirk and facet of this wonderful planet. None more so than in my fellow man, who spotting me awaiting a break in traffic, so kindly delayed locomotion toward his destination, so that I might not delay mine.

As such, upon reaching my place of business I was feeling a strong sense of amity with my brethren. 

As I walked towards the buildings's glass doors I could - squinting through the reflected sunlight -  just about discern the figure of someone else walking toward them from the opposite direction. Delighted at my opportunity to repay the universe for the earlier kindliness done to me, I earnestly leapt aside, and - like an eager courtier - with a flourish, ushered them through the door ahead of me. I maintained this courtier-like pose (head-bowed. Arm flung out to one side) for some seconds, before questioning that no-one had passed through the door. And that's when it hit me, that this person had both in gait and dimensions been not all that dissimilar from me. So un-dissimilar in fact, as to have been of me. Which obviously he was.  

As I passed through the doors to the reception I was hoping, of course, that no-one had noticed my little contratemps. I think I got away with it, but for one young lad, looking at me with a curious mixture of 1 part astonishment, 2 part contempt, and 3 part fear.