The Double Kamehameha is an energy wave created by Goku sometime after he left to train Uub. To utilize the technique, Goku performs the normal charge-up movements; however, upon speaking "hame," he takes his top hand and "scoops" out some of the energy, placing his hands on either side of himself. Once this step has been completed, Goku shots the two energy waves at the opponent, inflicting a large amount of damage.