Optical illusions
 

I love optical illusions. Whether I have to use the a different lobe or my rods get bleached either way they're fun.

Post up some of your favorites.

The hypnosis one is my favorite.

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WARNING: This last one is awesome but totally screws with your perception afterwards.

ALSO: There are no stupid monsters or zombies that will jump out and make you bust a valve in any of these..

This one is stupid but worth a laugh. NSFW Kinda.
 

This one is pretty language safe but might not fly at work so I'm listing it NSFW


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Now that would be one hell of a screen saver! :icon17:

I've seen the hypinosis one, and it doesn't work on youtube like it should :( Image is too pixelated, and the "high" effect ends up now being that strong, but still works none the less. I remember when I was a kid I went to the local college for a field trip and had a two hour presentation on optical illusions. Some of the ones they showed were crazy. One of my favorites is the one with the screen full of checkered circles that look like moving snakes no matter where you look.