First, Goku draws his hand back to his upper side and charges a yellow energy sphere. Then, he shouts "YOU FOOL!" as he brings his hand forward and fires an emanating yellow energy wave at the opponent, inflicting a great amount of damage.
Goku uses this attack against Frieza in his 100% Power form. After Frieza is accidentally bisected by his own Death Saucer, he begs for mercy from Goku, who reluctantly shares some of his energy with the tyrant and flies away. Though, Frieza does not accept defeat and attempts to kill Goku with the Last Emperor technique, but a furious Goku yells "You fool!" and counterattacks with the Angry Kamehameha, overpowering Frieza's attack and seemingly destroying the tyrant. However, it is later revealed that Frieza survived but heavily injured and floating in the space.
In Dragon Ball GT, Super Saiyan 4 Goku used a similar move on Golden Great Ape Baby to shoot off his tail.