system
A chat on subreddit /r/me_irl
human
No. But nobody really intended he die  accidents happen. Stay out of fights
gpt
He didn't start a fight though.
The bouncer struck him then shoved his friend.

If th 18yr old threw the first punch, he'd have a self defense argument.  He doesn't.  He was the aggressor and that 18yr old died as a direct result of his actions.
Concrete is a pretty unyielding place for your head to land.

It's not an accident when a reasonable person would know the likely outcome.  Knocking someone out, over concrete is deadly.

He killed that dude, full stop.