thats silly, the only real training you need when you carry a lethal option with you is something called escalation of force, i have a series of unlock codes in my head that would have to get ticked off before i let someone even become aware that im armed, if i take my knife out someone is getting cut, and probably at that point im aiming for your jugular, i guess the only other thing to know is never let your knife get taken from you, i have some knives that make it virtually impossible for you to get killed by your own
and i would never get in a knife fight, both of you are going to get gashed, id just book it