The evil Saiyan escapes his prison cell and attacks Goku, Vegeta and Future Mai. Goku and Vegeta attack the evil Saiyan, but his aura drives Goku berserk, causing him to attack Vegeta. Fu reveals that the evil Saiyan's name is "Cumber", and explains that his energy can turn people into a berserk state by just touching his aura. Goku continues attacking Vegeta; Future Mai is almost caught in the crossfire, but Future Trunks appears and saves her...