The old man that sits on the edge of the bench and asks you how your day was.
When you get off the bench you realize that he is collecting dog shit .

Life is not what it seemed to be child...

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.