Dragon Ball Z Episode 4

The situation looks bleak for Goku and Piccolo, as Raditz easily deflects every attack they send his way. But Piccolo may have a way to stop the sinister Saiyan. He?s perfected a powerful new attack ? the Special Beam Cannon! There?s only one problem. Piccolo needs time to gather the energy for the blast, which means Goku will have to last for five minutes against Raditz alone!