Other source:
Gohan attempts to free the Z Sword, but can't do it in his normal state. He transforms into a Super Saiyan, and with a mighty heave, he frees the sword from the rock. To his great surprise, the sword is incredibly heavy, and he must now train himself to use it. Back on earth, Babidi and Buu continue their reign of terror, and Goten and Trunks tell him that they're going to destroy him and Buu.
