"Life or Death" (生か死か Sei ka Shi ka, lit. "Life or Death") is the one hundred twenty third chapter of Dragon Ball Z and the three hundred seventeenth overall chapter of the Dragon Ball manga.
As Gohan and Krillin look at the giant crater made by the Spirit Bomb, Gohan wonders whether Goku and Piccolo got sucked into the explosion or not. He notes that he cannot feel their ki, but then spots them climbing out of the water onto a nearby rock. The two excitedly fly over, to the delight of Goku and Piccolo. After watching the crater finish getting filled with water, Goku says that they should go home, noting that in his spaceship it will only take five days. Krillin then gets agitated, and says that they almost forgot about Bulma. Goku not to get him excited like that, as he thought Frieza had popped up again. Krillin humorously says that Bulma can be scarier than Frieza in the right mood.
Piccolo says that Namek has suffered greatly, but says that Guru and the others can now rest in peace. Krillin asks Piccolo how he knows about Guru, but immediately after a mortified look appears on his face. Frieza, still alive, stands on a cliff in front of them, and immediately fires a Death Beam which strikes Piccolo in the chest. Piccolo falls backwards to the ground, and an angered Frieza says that even he thought he was dead. Goku tells Gohan and Krillin to get Bulma and flee on his spaceship. Frieza laughs and says that none of them will escape, and grabs Krillin using his telekinetic powers. As Goku watches in horror, Frieza kills Krillin in a single explosion.
The sight of seeing his best friend so heartlessly murdered is too much for Goku to bear, and as Frieza laughs, something inside Goku snaps. His hair changes from black to gold and stands on end, much to the surprise of Gohan and Frieza. Goku tells Gohan to take Piccolo and return to Earth, yelling at him to leave while he still has control of himself. A frightened Gohan agrees to do so, and Goku turns and glares at Frieza.