The picture above is an example of one of Beever's works that I did not initially understand what was in real life, and what was chalk. My first time viewing this, I thought the "smaller" person on the top of the beer was part of his chalk drawing. Upon further inspection, I realized that that is a real person, sitting on the ground, much farther away. While the mind is perceiving the beer as standing up perpendicular to the ground, the "smaller" person being real and of average size conflicts with this perception, and is left to enhance the illusion. Beever, the man in the hat, stands at the base of the drawing, seeming to be in line/parallel with the beer.