THIS VIDEO IS A FEW YEARS OLD, my scream has improved since this, I had only been screaming for a couple months when I made this video. Check out my newer video "The Making of a Scream" just more detail on using your diaphragm IMAGES: http://www.betemunah.org/body_files/image011.jpg http://schools.look4.net.nz/science/biology/human/respiratory_system/respiratorydetail.jpg http://www.uic.edu/classes/bios/bios100/lecturesf04am/humrespsys_1.gif