I sit crosslegged in front of my iMac computer and bang at the keyboard. Electronic mail this time. Suddenly, I notice my image in one of the two loudspeakers in front of me. There I am, wearing my orange T-shirt. I check the other, and the image is there, as well. For some reason, I have missed all this until this very moment. The two loudspeakers are spherical, made of clear plastic, but they have round metal membranes in front. Because the membranes are concave, the two images are upside-down. Perfect!