Identical Photographs fall off wall at exactly the same moment

In the summer of 1987, my family returned to a holiday cottage we had found the year before on the coastal path in West Wales. It is in a beautiful and remote setting and was large enough to comfortably sleep 10 of us. It fulfilled all our needs for the foreseeable future and we planned many more annual stays there. I took a photograph of the cottage in all it's glory with the beach in the foreground and the Preselli Hills in the background and was so pleased with it that I ordered two framed, poster-sized, prints, one for myself and one for my in-laws. Now, because I own the negatives, I can be fairly confident that only two of these framed photos exist, one hanging on the wall in my home in Andover and the other over 150 miles away on my in-laws wall in Swansea, which makes them pretty exclusive. At precisely the same moment, 3:00pm on Christmas Day 1987, both these identical photographs fell off the wall and crashed to the floor. Nobody was near them when they fell, there were no earthquakes in Britain that day and no other pictures fell in either household. Then, to add even more mystery, in the first post delivery after Christmas, my father-in-law opened a letter from the owner saying that the family were banned from the cottage because of the state in which we left it. I was one of the last to leave the cottage and can say hand-on-heart that the place was in immaculate condition when we left, we'd even hoovered the carpets! Could a poltergeist have visited after we left and trashed the place? Was that same troubled spirit responsible for our crashing photographs six months later? Can they work their mischief simultaneously while being hundreds of miles apart? I don't know the answers and confess I am baffled to this day. It certainly made me wonder about the supernatural, even though I tend not to believe all that stuff. But what other explanation can there be? What are the odds of the only two existing copies of a photo falling off the wall in houses separated by well over a hundred miles on the same day, let alone at the same moment in time?