Don't forget the Zeroth Rule of Self-Defense:
Do your best to AVOID getting into a situation where you need either a gun or martial arts skills.
best rule evar
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RE: shoving matches, threatening situations which are not fully escalated, etc:
You pretty much just have to play it by ear.
It's generally not that hard to de-escalate a situation if the other person is not dead set on violence. And if they are dead set on violence, well, that type of situation has it's own set of rules I think.
So either a person is intent on causing violence, or they're F'ing with you for sport. If they're F'ing with your for sport, you must remember to control your reactions, as an overt display of fear could 'tempt' a predatory assailant into attacking outright.
Diplomacy is not a bad idea at all. Also, making eye contact, and making conversation, pre-emptively, is a good step. There have been several situations where I was relatively certain that an individual was "laying in wait" where I HAD to pass by, but by making eye contact, smiling, and making friendly chitchat, as I approached, I basically "ruined the mood" for the would be mugger. It would be easy to dismiss this as just my misinterpretation of their intent, but I'm a far cry from paranoid, and not the sort to judge on appearances. I feel pretty confident that I'm talking about actual instances of psychologically deflected aggression.
That guy in the video pulling that knife, was definitely not intent on cutting anyone. But he was pretty stoned, and he got a 'rush' out of seeing peoples' reactions to pulling out a knife like that. He was power trippin. Best response would be a friendly one. tell him he has a cool knife, and move on. I think the person in the video responded pretty appropriately. If the person looked a bit more intent on 'using' his knife, then you could draw a weapon at your side, flip on the laser sight (which will draw a LOT of attention), and again, smile and tell the guy you like his knife, make all kinds of friendly space for the other person to back down in while saving face.
That's something to remember in diplomacy, always create room for the other person to change his course of action and still save face. While putting as many psychological blockades as possible between him and his original idea of attacking you. You're basically throwing up walls, and leaving trails of breadcrumbs, to corral his behavior towards a desired outcome. Done artfully (thinking something like Derren Brown), without any form of threat, it can make you wonder if there is such a thing as free will.
And you know, before a situation comes to real violence, you can 'threaten' as a last resort. something like "I've tried really hard to not have to kill you, you gonna make all that good will that go to waste?" or, if time doesn't allow, just being directly aimed at, with a very serious facial expression, will communicate the message. A show of force, as a last resort before an application of force.
One downside of martial arts defense, is that it doesn't have as much deterrence value. Having a laser sight on their chest or head makes the situation 'crystal clear' for a would-be assailant. While assuming a martial arts stance doesn't really communicate the same sense of 'finality' to the would-be assailant.
One upside of a physical approach though, is that you can "not-kill" your assailant, just pull him into an arm lock or something and break his arm, or apply a lot of force to his testes, etc. Which is advantageous if the situation is not really a life and death situation.
I'm familiar with the Port Arthur massacre.
It is curious that the far worse massacre in South Korea hasn't prompted a change in laws there though..
I guess if a cop is to blame, it's just the one individual cop, but if a civilian, clearly the laws are atrocious and must be tightened. No matter that had the old ones been enforced, the deaths could've been prevented..
south korea isn't nearly as liberal as austrailia. also S korea lives under a constant state of siege from N korea, and private ownership of firearms is part of the national defense there.
also, frankly, the port arthur massacre only went on for as long as it did, because of a lack of popularity/legality of carrying firearms there. I am reminded of an incident in a Jerusalem airport quite a long time ago, where two terrorists pulled AK-47's out, and started shooting at the civillians... who in turn... pulled out firearms of their own and killed the terrorists before they managed to kill anyone, and long before security arrived.
The only really bad scenario, the scenario which causes "massacres" that make international news, is when lawful citizens are strongly discouraged or forbidden from being armed, while simultaneously failing to completely block the access of criminals to arms. So that the only armed parties are the criminals. Whether you are in favor or against gun control, it's painfully obvious that this 'halfway' point is by far the worst arrangement.
Personally I'm fairly strongly against gun control, for 2 reasons, one, it's an equalizer between genders, people of different body sizes, the disabled, and numbers of people (small gangs etc)... so that weaker parties can deter violence against them, and/or defend themselves if necessary. and two, I don't trust the government any further than I can throw it, which is to say 'not at all'. And ultimately, an armed populace is a 'last line of defense' against governments committing atrocities, or putting populations under the thumb of tyranny. either one of these two reasons being more than sufficient argument by itself.
Besides which, it's been shown "exhaustively" that legalized concealed carry of firearms dramatically reduces violent crime in an area (though it does increase "non-confrontational crime", a fair trade IMO).
But you know, purely random acts of violence are not all that common. much more common is getting yourself into trouble by failing to be aware of your surroundings and/or failing to interact with others effectively. Even being too quick to be suspicious of others can be a trigger. As Bill & Ted said: "be excellent to each other", it goes a long long way.
(it also doesn't hurt if you understand the thought processes going through the other person's head better than they do)
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and on that note, I've got a bit of time off from work. So I'm going to cart the boyfriend critter off to the shooting range either today or tomorrow, and spend lots of money on ammunition, and mercilessly kill innocent pieces of paper.