A unexpected Sighting

I live in the Midwest. During the month of May, my son and I visited my Cousin and her family for a Month in the Orlando area. We spent a day at Disney World. I was certain that I saw my Endocrinologist walk right past me. How could that be? She lives 1,200 miles away! 5 days after my return, I had an appointment. Yes, it was her. She and her family were at Disney World that day. Very weird!