This illusion comes into play when you look at different sections. Where does the man appear to be standing? Is he leaning over a balcony or standing on the tiled floor?
This is fun. If you focus on the floor and then the pink background, the figure on the right should hop from one place to another. Your brain will perceive him as standing on the tiled floor when you focus on that or looking over the railing if you look at the pink background. Yet again, this is an example of how our brain is constantly trying to interpret our environment.