All,
returning to the original theme, I see another ?allied? phenomenon on my TV. It is positioned so that walking by the room, I can see the screen through a slit between the open door and the door frame. Walking by, or standing still and moving my head, I can see vertical black lines on the screen, that are either truly vertical or sloped, according to how fast the eye is moving, side to side.

Try it yourself! How does this happen? The lines painted on the screen by the electron beam are horizontal.

John