http://articles.mercola.com/sites/articles/archive/2006/09/12/this-cool-optical-illusion-will-make-you-hallucinate-part-one.aspxAmong my favorite diversions are optical illusions . Not only are illusions amazing to look at, they are a fun way to test your vision . The most amazing part of this cool 100-second video is not its intended effect but how, as you view the illusion,enCommunityServer 2008.5 SP1 (Build: 31106.3070)