Mr. Mackey is now gluten free and everyone is annoyed when he won't quit preaching about how great he feels.
The boys return back to school after having left to build a start-up company, but they find that the rest of the school aren't exactly welcoming them back with open arms. Meanwhile, a massive outbreak starts when people find out that wheat and gluten are actually poisonous to the body, as no one seems to know what's okay to eat and what isn't.—Owen Paul Sloane
Mr. Mackey is now gluten free and everyone is annoyed when he won't quit preaching about how great he feels. South Park becomes the first town in America to go gluten free after witnessing a disturbing demonstration of what happens to your body when you do eat gluten.—WildChase