Look at the picture and after 15 seconds a new picture will apear in color.

[coolplayer width="380" height="320" autoplay="0" loop="0" charset="GBK" download="0" mediatype=""]
http://www.youtube.com/watch?v=m5SDGzfNrfI
[/coolplayer]

A 6′ circular projection screen made from steel and paper was photographed, imported into Adobe After Effects and animated. This video was projected back onto the original screen to create moire patterns and some kick ass visuals.

[coolplayer width="380" height="320" autoplay="0" loop="0" charset="GBK" download="0" mediatype=""]
http://www.youtube.com/watch?v=H6QeHDyehwQ
[/coolplayer]

Park your car at the Fairy Tree on the magic road in the Comeragh Mountains in Waterford, Ireland and be amazed when all the brakes are released, the car rolls up hill instead of down.

[coolplayer width="380" height="320" autoplay="0" loop="0" charset="GBK" download="0" mediatype=""]
http://www.youtube.com/watch?v=3f7mrJDbDMM
[/coolplayer]

The Penrose triangle, also known as the tribar is an impossible object. It was first created by the Swedish artist Oscar Reutersvärd in 1934. The mathematician Roger Penrose independently devised and popularised it in the 1950s, describing it as “impossibility in its purest form”.
The object you see in the video has been designed in AutoCAD R14, then rendered in Inventor.

[coolplayer width="380" height="320" autoplay="0" loop="0" charset="GBK" download="0" mediatype=""]
http://www.youtube.com/watch?v=MOyEiKS9xzc
[/coolplayer]

Little model I did for Doctor Who Adventures. It exploits the inverse face optical illusion to give the impression that k-9’s head follows you around

[coolplayer width="380" height="320" autoplay="0" loop="0" charset="GBK" download="0" mediatype=""]
http://www.youtube.com/watch?v=ofj8TUYXOMw
[/coolplayer]

Liberate your mind. Watch it through, then determine the difference from beginning to end. Re-examine the beginning. Isn’t the mind peculiar?

[coolplayer width="380" height="320" autoplay="0" loop="0" charset="GBK" download="0" mediatype=""]
http://www.youtube.com/watch?v=XAD_6hAKV4o
[/coolplayer]

This demonstrates Color Adaptation. It lets you view an altered picture of Paris Hilton for 30 seconds and then shows a black and white version, except you will see it in color

[coolplayer width="380" height="320" autoplay="0" loop="0" charset="GBK" download="0" mediatype=""]
http://www.youtube.com/watch?v=PpW2GkuEhrc
[/coolplayer]

Step right up and create an incredibly creepy clown illusion that is sure to scare. Imagine a freaky circus clown floating in mid-air! This DVD gives you simple instructions on how to make this scary optical illusion completely effective

[coolplayer width="380" height="320" autoplay="0" loop="0" charset="GBK" download="0" mediatype=""]
http://www.youtube.com/watch?v=PcKknQHHVgo
[/coolplayer]

Fan video of amazing 3D sidewalk chalk drawings by Julian Beever and Kurt Wenner set to the song “Sidewalk Pictures”

[coolplayer width="380" height="320" autoplay="0" loop="0" charset="GBK" download="0" mediatype=""]
http://www.youtube.com/watch?v=SjcEN765yTo
[/coolplayer]

Square A and B are different right?

[coolplayer width="380" height="320" autoplay="0" loop="0" charset="GBK" download="0" mediatype=""]
http://www.youtube.com/watch?v=UOkZPKj3yRI
[/coolplayer]