Have you ever looked into your rearview mirror when stuck in traffic, and watched the person/people in the car behind you? They are unaware you are watching them (spesh if you have shades on then you can stare!) and you see a moment from their lives, open and unguarded.
The tired middle aged couple who stare into space and don't speak, the young mum with boisterous kids in the back yelling at them, the lone guy leaning against the window with a ten yard stare, not noticing when you move off away from him, the teenage couple laughing and joking with their mates in the back seat, the happy couple smiling and chatting and exchanging glances, the young girl singing along to her favourite song, the angry couple having a furious argument, and the usual twat gassing on his mobile and then trying to drive and change gear with one hand as you move off.
A moment in their lives - try to imagine what sort of life they have from that small segment, are they happy? Where are they going, where have they been?
And also be aware that you may be watched when YOU are next bored in traffic, so don't pick your nose!!!