This optical illusion dance from Germany will blow your mind.  This "Strumpfhosentanz" dance, translated "sock and trouser dance", is cleverly choreographed and costumed to trick your brain into seeing things a bit differently.  Genießen!  er.. Enjoy!

When I came across this video, my mind was blown.  The trickery these women use to fool your brain is simple but effective.  Even though it is very obvious how this illusion works, it doesn't make it any less impressive or fun to watch.  Ill admit the song gets a bit annoying, but maybe I just need to expand my German dance music palette.