In this chapter, Tommo describes the transformation of a young man named Masa into a pro-eating machine. He explains that Masa took less than half a year to transform from a "young big" to a "pro eating machine" . After seeing Masa's "special size" , the instructor at the gym decided to use the food Masa was eating to train his jaw . Masa ate five boiled octopus every day , and his jaw became "unstoppable" ! The instructor calls Masa a "secret weapon," but Tommo says Masa looks just like a guy who worked years at the metal shop . The next day, Masa eats eight hamburgers in seven minutes . This is the third time he's crushed four burgers in a row . He's also won the 100 store eating contest , where he had to compete in 100 stores in a month . That's a lot of competition ! Masa won the first time, and he won the second time too ! Tommo is so proud of Masa for beating all the other guys in the contest . But Masa has one weakness, which is that he eats too many food at once .