When I was younger, I would sometimes drive past a gleaming hubcap on the side of the road, and I would marvel at how that hubcap managed to come to a rest on its edge after careening off of some car or truck. Time and time again, I would see these hubcaps leaning against light posts and street signs. Funny how they always land that way, I thought.
Later, I reasoned that this phenomenon was the work of some Good Samaritans who had propped up the hubcaps so that their owners might spot them more easily.
I was probably about 35 when this finally dawned on me.