I also saw that on display all the time up in North Michigan growing up. Bar fights happen, usually when some citiot got drunk and ran his mouth. It usually ends in a lesson with a whooping, but no permanent damage.
But here a guy got drunk, ran his mouth, got punched and might end up permanently impaired or dead.
Some think thats ok, he had it coming.
I'm not arguing that it doesn't happen, I am saying that I don't think there's ever a good reason to sucker punch a sloppy drunk into a coma. Its that simple.