I've always been fascinated by this concept.

Well, I say "always"...  But certainly a long time.

I stumbled across the actual name of it a while ago, and then promptly lost/forgot the link.  Spent a long, long time Googling various phrases, before finally getting back to it.

I regularly find myself watching strangers, and wondering about their lives.  What do they love?  Fear?  Hate?  Do?

We're all just bit-players in someone else's epic.