(Submitted by reader Chris C)

My best coincidence experience was when I was sitting in a staff meeting (group supervision for a psychological clinic that I was working at) and all five of the people in the meeting had lived, at one time or another in their life, in Lawrence, Massachusetts — including myself.  This was a clinic in Irvine, California.  We had all known each other for some time, were all students of the school, had enrolled at different times in life, had moved to California at different times and for different reasons, and it just happened to surface while sitting around chatting.