Hah I did this when I was setting up my 12x. It was upside down pointing at my main monitor and zoomed in far enough that most/all it could see was its own live view window at a slight angle. This created a trippy effect where the live view area was split in half diagonally with a bright line, with everything that appeared on the top half also appearing mirrored on the bottom half. If I moved the mouse pointer around on it, the pointer would be duplicated repeatedly, each time with the new copy appearing closer to the center than the last one. Occasionally the bright line in the middle would bloom with some color. I wish I had recorded that.