The Chance Meetings thread reminded me of some of the unexplained things that happen.
Somewhere in the bowels of the mudcat earth there is a thread on serendipity- fortuitous events we've all experienced that follow no logical path but are coherent and to the point. I can't find it. (Good gracious. Talk about pedantry. But, hey.)
I'll start with this one: Some years back my brother's family in Michigan and my sister's family in North Carolina planned to travel together to visit Oregon. My sister's family was to come to Michigan beforehand and they would travel in two cars, making some side trips, staying in the same motels, making it a fun part of the journey.
A few days before the scheduled activities, one of them notified the other that they wouldn't be able to make it after all, and to go ahead without them. They would come later, if they could.
On a freeway outside Laramie, Wyoming, my brother moved out of his lane to let in a car coming up the ramp. It was my sister's family.