From AW:
Ever wonder how the small arrow on your computer monitor works when you move the mouse? Well, through the miracle of high technology and the aid of a screen magnifying lens, the mechanism becomes apparent. Click on the link below and you will find out. The image may take a minute to download and when it appears, slowly move your mouse over the light gray circle and you will see the magic. You can also click your mouse on the gray circle to see what that does. Amazing!
OK, that’s really funny.