The amazing pinwheel is a very freaky
optical illusion! This trick
involves downloading a simple program
(pinwheel.exe). Download this file and run it
from the directory in which you indicated the
file be saved. The pinwheel will appear on your
screen at this time. Stare directly into the
center of the pinwheel for 60 seconds. Then
immediately look away from the screen and at the
back of your hand. This trick is very amusing.
Try looking at other things in the immediately
vicinity as well! Have fun!