The next training exercise that Kaio-sama gives to Goku is to hit his valet, Gregory, with a hammer. Goku frantically persues Gregory, who is even faster than Bubbles at running away! Then one day, Kaio tells Goku of the barbarous history of the Saiyans, and how all but four of them had become extinct. Upon hearing the tale, Goku's fighting spirit is fully released, and he devotes himself to his training to defeat the Saiyans!