No stone throwing, RichDoyle, as I also wonder how I have managed to avoid catastrophe. Wouldn't do the coffe cup pickup these days, but could see myself doing it 35 years ago. Balls or stupidity or luck, the rider had skills, too.
WheatonFJR: Two summers ago, I was cruising back to ATL from a long day riding along the FL state line. Doing 75 on I-75, and a Victory with blue neon underlights pulled beside me -- beside me in the same lane. He reached for his beer in a handlebar-mounted cup holder, took a swig, and motioned, "You want one?"
I politely declined, but we drove side by side chatting over the road noise for 20 minutes until he exited a few miles south of the Perimeter. It was very calming, believe it or not, and provided a nice energy boost for my final miles through town to the northside.