The negative was "flopped" in that picture of Gary. Remember negatives? Before digital photography there was a thing called film, and when exposed to light, it produced an image, but the image was reversed. When "developed" the image was natural, but if the negative was upside down when printed, everything was reversed.
I had my own darkroom for years. For developing film.
I didn't explain that very well, kids, but trust me.
We've certainly come a long way.