And that was what he was going to do. The enemy of the month was an assassin named Taopaipai, an incredibly powerful, and evil, man working for the Red Ribbon Army. Taopaipai thought he had killed Gokuu. Only a fluke had saved him, when Taopaipai's blast hit the Dragonball in his shirt pocket. Gokuu was knocked out, but he still lived.
Most youths think themselves indestructible.
At the time, Gokuu did too. He was more powerful than anyone else, but he also faced more dangers than anyone else. Yet nothing fazed him, as each win lead him to believe that he could continue to win in the future. All he had to do was train. If he devoted himself to his training, there was nothing he couldn't accomplish.