Dragon Ball Z Volume 4 - Dragon Ball Z As the cosmic battle between Goku and Vegeta continues, Goku is forced to use the dangerous Kaio-ken technique. But Vegeta reappears, changing himself into a 50-foot ape with superpowers, including energy strong enough to explode mountains. As Goku lies with his ribs shattered, his - and earth's - only hope is the genki-dama, the "spirit bomb" p... more »owered by the chi of all living things on the planet.« less