First, Goku charges at the opponent and kicks them up into the air. Then, he flies up after the opponent and double axe-handle punches them down to the ground. Next, he powers up to his Kaio-ken technique as he charges down at the opponent and double-punches them in their back. Finally, Goku quickly lands on the ground and catches the opponent on their back before throwing them onto the ground, inflicting a great deal of damage.
Goku uses this attack to defeat Nappa. Frustrated that he is unable to defeat Goku, Nappa decides to take his anger out on Gohan and Krillin. Nappa charges down to the ground where the frightened Gohan and Krillin are and prepares to kill them with the Break Cannon (a mouth blast), with Goku in pursuit. Realizing he is not fast enough to stop Nappa, Goku activates his Kaio-ken technique and attacks Nappa with the Kaio-ken Finish, breaking the Saiyan's back and saving Gohan and Krillin. Goku states that Nappa's injuries are so severe that he is unable to fight ever again.
Goku later uses the attack against Burter during their battle on Namek, knocking out the Ginyu Force member and allowing Vegeta to later kill him, much to Goku's dismay. He also uses it to kill Kishime in the movie Dragon Ball Z: The World's Strongest.
Appearances in games
Kaio-ken Finish was named in the Raging Blast games, where it is one of Goku's Super Attacks in his base form. Under the name Kaio-ken Attack, the technique is one of Goku's Blast 2 attacks in Dragon Ball Z: Budokai Tenkaichi and Dragon Ball Z: Budokai Tenkaichi 2.