Illusion

[Greg]

A new one, to me anyway:

http://www.scientificamerican.com/media/inline/blog/Image/CurveBallShapiroIC2009.swf

 

[TheCigarKid]

That's pretty weird, it strained my eyes! AH

 

[stogies&hoagies]

Cool. I changed the parameters. The faster it spins it goes right instead of left.

 

[Alwayslit]

great sight trick