When I was a professor at a local college, I was on a field trip to a park in Fort Lauderdale with my students. I had them taking pictures of the park and children playing for a photo essay project I had given them. The year was 1978 mid summer, I believe.

When we got back to the class room I had them go into the dark room and develop the black & white film. When one student came back to me with a beautiful exposed roll of film, with the exception of one frame right in the middle one frame appeared to be blank. I could see a faint image and asked the student to print it. This is what was on that frame.

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When I showed this to my class another student said his Dad had a similar shot that he took out the window of an airplane. He brought it in to my classroom and it was almost a duplicate match.