Erm...I'm a mid 30's 200 pound 6ft lefty who's been doing martial arts since a child,and was a bouncer for 8 years...which is a nasty combination,almost every fight ive been in(surprisingly few,I prefer psychology) has ended in either a knockout or serious injury for my opponent,the last group that attacked me and a friend while he was on the door was four against two,fought VERY dirty(throwing bottles and housebricks..one hit an innocent bystander girl who was having a peaceful smoke)ALL ended up hospitalised...even the one who claimed to be a boxing champ...so yeah I'm confident without getting cocky,I also shoot fairly well,and when I'm in the one dangerous city that I frequent,I carry a firearm,so I'm not particularly worried about it,
If I was gonna pass on one tip it would be from the legendary Geoff Thompson
(google him,and buy his books,they'll change your life!)
and that is that most people walk around with their heads up their asses and then are bewildered when they get jumped,cultivate a "Red,Orange,Green" mindset,you should NEVER be completely unaware of your surroundings...
sorry for wall of text,"TLDR"-,yes I'll destroy someone physically..BUT ONLY as a last resort,and you should ALL stay aware without being paranoid.