Battle at Korin Tower is the second level of the Dragon Ball Saga in the video game Dragon Ball Z: Budokai Tenkaichi 3 (Although it should be third in chronological order as the battle against General Blue takes place before this).
After training with Korin for three days, Goku has a rematch against Mercenary Tao. Goku's power greatly exceeds that of Tao's and Tao pretends to give up, however, he then uses his final plan, and throws a grenade at Goku. Goku is unharmed and then defeats Tao.
If not pressing the transformation button in this level then the player won't get hurt by Tao's ultimate as they won't have to deal with it.