ONLINE HALLUCINATION

Once the image loads, and starts to spin full speed (it should get up to one full revolution per second, or more) center it on your screen.  Then look at the very center black dot for about 20-30 seconds without shifting your gaze.  After that look immediately at your keyboard, or a dollar bill, or almost anything. It will appear to wiggle, move or breathe on it's own.  You may also notice 'zooming' effect as if it's approaching warp speed.  

For the fullest possible effect, windows users can download  hallucinator.exe