S1·E8 The Kamehameha Wave

Having thrown away the Basho Fan, Muten Roshi heads to Mt. Frypan to extinguish its flames himself!! Muten Roshi’s grand attack, the Kamehameha, puts out the blazing flames! Goku and the others safely obtain the Dragon Ball, and are about to head off in search of the final one. But Bulma is detained by Muten Roshi, since she promised to let him fondle her breasts if he put out the flames. Bulma gets out of this pinch by asking Oolong to transform into her.