Dragon Ball Kai Episode 7 English Dubbed Episode Title:The Battle with Ten-Times Gravity! Goku's Race Against the Clock!.Episode Description:After three weeks, Goku succeeds in catching Bubbles. He is then issued his second challenge, to hit Gregory, the flying grasshopper, with a large mallet. After two weeks of trying, Goku succeeds and fully masters the planet's gravity in the process. King Kai then proceeds to teach Goku his signature technique: the Kaio-ken. On Earth, Gohan's training with Piccolo comes to a close, while the rest of the Z Fighters finish their training with Kami and go their separate ways.