Showdown in the Past

Krillin, Tien, Chiaotzu, and Yamcha are training at Kami's lookout, but get frustrated at the speed of their training. Mr. Popo instructs them to know themselves to become stronger, and to learn about their enemy to defeat it. Mr. Popo sends their spirits to the virtual reality of the Pendulum Room, where the warriors experience the overwhelming power of the average Saiyan. Then they learn the terrible reality that the two Saiyans who approaching Earth are twice as strong!