Chris asked, "Out of interest, how much time is spent in your dojo dealing with knife response? And how much in knife training?
Thing is, "stay away from the blade", unless you manage to create quite a bit of distance (to escape) is really a short-term defence… and gets overwhelmed pretty quickly. You can only avoid for so long… eventually (pretty soon, really) you'll get caught… and then, well, it's the beginning of the end…"
Chris, honestly we don't spend enough time on it. We know it, but anything is better than nothing, generally. Unless we're not doing technically/practically sound stuff, I get that. Trying to work more and more knife work into my school's curriculum, but the time constraints are a hindrance to getting that done right.
I wasn't clear about it initially, but my phrase about "keep away from the blade," wasn't a reference to the time-honored Run-Fu techniques (i.e. Run Away! Run Away! - Monty Python fan), it was a tactical statement. If the blade is in attacker's R-hand, then we found it is a measurably-less stupid way to move in against the knife on the attacker's left side, attempting to get control of the unarmed side, and go right into the first nasty thing that could render the knife-wielding hand ineffective that pops into defender's mind.
I'll grant you, writing out the above is WAY easier than performing it competently.
To me, it's got to be quick/direct/brutal and over before the knife guy figures out that you didn't just run. Been to enough knife clinics where the instructor had everyone bring an extra white t-shirt that they didn't care about to, then "armed" everyone with Sharpie pens with red ink to point out exactly how easy it is to get cut, how many times you can get cut in a VERY short span of time, etc. Scares the bejeezus out of me thinking about fighting a dude with a knife who knows how to use it (Arnis, etc.). It is very weird to be in a seminar and have the instructor, in all seriousness, start saying things that sound like they come out of old-school Samurai code (because they did). Only fight when you are prepared to die, for a reason for which you are prepared to die and accept the death that comes and be surprised when it is you that did not die.
Yikes! It's a long way from judo class, that mindset. But, ti's what you got to have in order to survive on something other than luck. Though... it's always to have good luck, too.