Dragon ball z episode 12

DragonBall Z 12

Description: The End of Snake Way Gohan's training under Piccolo continues. One night, Gohan suddenly transforms into a giant ape and attacks Piccolo! Piccolo discovers that a moon image is being projected from Goku's old Saiyan space pod and Piccolo must destroy it before Gohan destroys him! Meanwhile, Goku finally reaches the end of Snake Way and arrives to King Kai's small planet, which has ten times stronger gravity than Earth's.