This link bellow is a video, about the advert of two new Mercedes CLS63 and E63 AMG.

http://www.youtube.com/watch?v=aXr9km0o1U4 

An illusion is a alteration of the senses, revealing how the brain normally organizes and interprets sensory stimulation. While illusions twist reality, they are usually common in most people. Illusions may arise with not just with visual illusion but with other human senses. These are the most known and understood methods. 

An example is shown bellow 

Optical illusion