Optical illusion

[Sailor Steve]

Originally Posted by Thniper

Any other illusions?

Yeah: put your two index (or any other) fingers together about six inches in front of your eyes. Don't look at your fingers; look straight ahead across the room. You'll now see a third 'finger' sandwiched between the two. If you pull them apart slowly the 'third' one will float in the air.

Take a pen or pencil between your fingers and shake it. If you shake it with the right rythm the solid pencil will seem to be made out of rubber.