Optical Illusion

Gaze at the image and stare with one eye on the left image, and one eye focused on the right image. After 15 seconds, you should see a third image appear. Now, for the magic. Using your right index finger, slowly move it toward the screen, pointing at the middle image and suddenly YOU HAVE TWO INDEX FINGERS!

If you found this experience annoying, commemorate the event and BUY SOME ANNOYING STUFF.
[Click the picture and shop away before prices increase!]