Ever wonder what that sandwich from lunch is doing while you're sitting at your desk in the afternoon? It's cruising down the alimentary canal, better known as the digestive system. Inspired by the headless torso with removable innards in her 5th grade class, "America's funniest science writer" takes a look at what goes in and must come out and everything everywhere in between. Find out about Elvis' megacolon, if you can really eat yourself to death, and what your style of chewing says about you. A bit gross, but certainly intriguing.