http://www.news.com.au/perthnow/story/0,21598,22492511-5005375,00.html
This isnt a joke its from this,
I see both ways, I think if you are thinking of a thing on the right side of your brain it turns tht way and then if you think of something on the left side your brain it turns the opposite way
Lol!they're Photoshopped.

Yes Indeed, It's Intresting. Though, It Comes under the Category Of Optical Illusions, It's Probably More Than it,
Eh, When the Legs come front, It's Mostly To Right to Left And When the Leg goes Backwards, It's Mostly Right to left?..eh?
Wait a minute....EDIT: Man, I can't Figure this out now, Need to Take my Coffee and Will get back on this later.
Till then,Thanks for this Amazing Subject.:hpraise
