Fine after being at the epicenter of an explosion that made the ground rumble for dozens of miles

CRAAKK! Number 17 delivered a powerful chop to Goku's back – in his concentration on the homing attacks, he had forgotten to watch for the cyborgs. He spun downward, out of control, only to be met by a powerful kick from the female. A brief instant passed before 17 slammed him to the ground with a double fist.

"This is the end for you, Goku!" screamed 17 through the howling winds, his usual smooth composure lost. The Super Saiyan was flat on his back, panting as sheets of driving rain filled his vision, choking him. Why couldn't he win? He was stronger than these machines, much stronger. This wasn't right!

"That's right!" shouted 18, her eyes even wilder than her brother's. "We're done with you! You're dead, got it?! Dead!"

Goku rolled over and pushed himself up onto one knee, panting. He needed more time, a plan – but he didn't have time. Could he simply escape? Instant transmission was out of the question; he couldn't risk lowering his guard long enough to try and find an energy signature. He hadn't spent enough time in this world to be able to just pull a ki signature out of thin air. He was absolutely stuck. No, he needed power. He needed it now.

"Ready, sis?" asked 17. She nodded. Both sets of light blue eyes, cold and heartless like the destruction they so loved, stared down at Goku. The two cyborgs rose into the air, the expressions on each of their faces beginning to show excitement for the imminent kill. Both brought their hands together. "DOUBLE PHOTON STRIKE!"

...

Goku clenched his fists, his entire body shaking, and looked up. The deadly beams were building, rushing toward him in a wall of destruction. He had to have more power. But how?

He closed his eyes. There was a way – he felt it. That flow of Super Saiyan energy, still pure and warm despite his fatigue. Embracing it like never before, he pulled the golden ki tighter around him, containing it with his strength, concentrating it within his muscles…almost like kaioken. The power flowed hot and thick, searing through his consciousness. Then he released everything – amplifying his anger, his desperation, his need.

"HAAAAAAAA!"

The Super Saiyan's muscles bulged as golden energy suddenly built up inside them, his aura expanding and rushing upward, brushing away the oncoming energy blasts like they were wisps of cloud. The ground underneath him cracked. Rays of energy shot away from him violently.

A thunderous golden explosion rocked the ruins of the city. A sphere of pure energy rushed out, shining brighter than the sun and sending the two cyborgs spinning. A few dozen miles away, Bulma felt the ground rumble. "Oh no – Goku!"

A black mushroom cloud rose over the smoldering ground as Ascended Super Saiyan Goku stood tall, his eyes shining with intense green light. His muscles had expanded dramatically; his aura pulsed angrily. Energy crackled white-hot around his feet.

Goku rose into the air and flew toward the two cyborgs, who were just now pulling themselves up. "This is the end for you both, murderers!"

- Bringer of Death Chapter 42