This is Interesting!
Here is, without doubt, the coolest PC-related illusion, I've come across.
To enjoy it, just follow the instructions:
1) Relax and lazily stare at the 4 tiny dots in the picture below, for at least 30-45 seconds.
2) Slowly, shift your gaze from the screen to a wall near you.
3) You will see a circle of light formed on the wall.
4) Start blinking and continue till u see a figure within the circle.
5) What do u see? Rather whom do u see?
I tried this a couple of times, to reconfirm.. man o man... freaky!