system
Given the following post, respond as if you're commenting on Reddit:
human
[Superman][Man Of Steel] What's the point of fighting another Kryptonian?

It seems that no matter how hard they punch each other, neither one gets hurt.  The only thing that happens is damage to the surroundings.  That is, until Superman twists Zod's neck.  

And another point... if Superman can survive his body being burnt to a crisp by a nuclear bomb, why doesn't Zod regenerate from a broken neck?
gpt
> if Superman can survive his body being burnt to a crisp by a nuclear bomb,

I think a dead-on hit with the nuclear warhead would've killed him. The fact that it hit Doomsday (who was absorbing energy from any source) first helped him survive. 

> why doesn't Zod regenerate from a broken neck? 

Perhaps if he had Superman's vast stores of solar energy and fully adapted to absorbing said energy then he perhaps would've, given time.