Also, nothing beats a good shanking. Honorable combat can bite my ass, pick up a rock, stab the fucker if you have something, and let the survivors tell their tale. I'm all for the philosophy and discipline of martial arts, but when my life is on the line the only thing that should matter is do I get to walk away from this or shall it be the last time I see my family again. Besides that, if this was going to be a fair fight, you should at least have the consent to say no to it. Once they take that option away from you the best thing you can do is scram, or be the bigger monster.

A good trick if you're one of those "I might hurt myself with this knife" type is find yourself a very long key. If someone does ever ask for your wallet, keys, etc, take this and slice the guy's wrist or whatever is soft if he comes to take it. Also carry a spare wallet or something that looks like a wallet. A small bag of rice hurts a lot more than you think when it's pitched at your face.