Free Optical Illusion

Pinwheel

This is a Windows executable you can download. When you start it up, stare at the center for about 20 seconds, then quickly look at the back of your hand (or the face of your neighbour). You will see the flesh move and turn as if it has a life on its own. Freaky ! Download pinwheel.exe (22 Kb).

Heatwaves

This is also a Windows executable. When you start it up, stare at the center for about 20 seconds, then look into the room or out of a window. It wil seem as if it's a hot day and heat waves are rising everywhere. Download heatwaves.exe (46 Kb).