The photo above uses the optical illusion where objects closer to the camera lens appear larger and disproportionate to those objects further away from the camera lens, along with that his posture helps the photos mood, the style of photo is to be quirky and fun, and the model is having fun and smiling.
The Photo above has only one light source and a dark backdrop, the mood that the setup creates is very depressing and sad, and the model embodies this perfectly, with just a litle more then half of his face in visible light, and his hand in the form of a gun next to his head, the feeling of sadness and despair is present.
