In my movie I train my diaphragm. My stomach becomes once as big as a pregnant woman, and once in a small scale and pulled in, that's not cheating, it's a real movie!
During the movie I measure the circumference of my stomach, I will squeeze it tight with my hands and strong cords. When I enter, my ribs go outside, I put my hands under them! My stomach is a plastic, that I can shape - you'll see it in my movie!