Moment with a Stranger

Have you ever shared a moment with a complete stranger?

I was driving my truck to the grocery store. I turn on my blinker to turn into the parking lot when I see a guy on a motorbike getting ready to turn out of the same parking lot. Out of the corner of my vision I see a blur riding down the side walk. I stomp on the brakes just as a girl on a pedal bikes comes zooming around the sidewalk right in front of where I am about to turn. The girl then proceeds to stop her bike right in front of me and the guy on the motorbike, text something on her phone then gets back on her bike and ride off totally oblivious I had almost smooshed her. I make eye contact with the  guy on the motorbike who smiles at me and shakes his head. He then indicates for me to "go away"  since by this time I had four other cars stopped behind me. I pull into the parking lot and nod a "thank you" to the guy on the motorbike. He smiles and pulls away. Have you ever shared a moment with a complete stranger?