People always mention eye gouging, biting and ball grabbing etc..
All have happened to me. All the people that did it ended up taking ambulance rides.
I still have a scar from the guy that bit me. I bounced his the back of his head off the concrete a half dozen times like a bowling ball while my fingers were stuck in his mouth.
After that didn't work I Kevin Randleman Pride style kneed him in the head 3 times which opened a vagina like gash on his forhead.
After that didn't work I picked up his nextel i1000 and stabbed him in his eye with the short stubby antenna and then wedged it inbetween his teeth to pry my hand out.
The guy started crying and had a mental breakdown and ran down the road. He then started hitting his head on a store front and KOed himself. I had to call an ambulance for him.
I 22 or 23 and working as a doorman at a little lounge. This dude was in his 30's and like 50lbs heavier then me. In hindsight the guy was wasted, prob on drugs and had mental health issues (nobody talked about mental health back then).
A lot of the people I beat up at clubs and bars probably had some kind of mental health topics that the drugs, booze and alcohol made more apparent.