Get two shop broom's, unscrew the steel handles. Take an old basketball. Put a basketball hoop on a big wall. Give one broom handle to your friend. Hit the basketball into the wall to start; pass it to your friend. Keep playing pass until somebody gets a point. Aim high.

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.