At a library sale, Homer buys a book on world records published by Duff. After boring everyone with world record trivia, Homer gathers the whole town to build the world's tallest human pyramid. When Jimbo and Kearney move their hands just before the record is claimed, the pyramid collapses into a giant sphere that rolls through town, collecting Agnes Skinner, Hans Moleman and a suicidal man about to jump from a ledge onto the street. The entire town rolls to a truck-weighing station and the Duff record book officials declare Springfield the world's fattest town, ahead of Milwaukee.