Welcome to illusions part two. do not look too long it may hurt your eyes.

1. http://www.opticalillusion.net/wp-content/uploads/2008/08/duckrabit-550x457.png
Rabbit or duck?
2. http://www.buzzle.com/images/optical-illusions/optical-illusion-window-grill-steps.jpg
3. http://www.thisismarvelous.com/postImages/Julian_Beever_3D_optical_illusion_chalk_drawing_waste_water.jpg
4. http://www.moillusions.com/wp-content/uploads/2010/03/jackson2.jpg
Really cool,huh?

I see one pic look like Rabbit.

The last one is Michael Jackson. I love the chalk on the street picture though, I've seen many of those illusions.