Richard,
Guro Plinck did not poke a hole in your lowline on that video, did he?
Just kidding.
What you are talking about, pushing in during a trap is
very relevant in this conversation because prisoners pump serious iron whilst vacationing in the can, and they can push through about anything they want to. You are using finesse and skill, they would be using brute force, but the result of that same trap you described would be the same. A thrusted/cut Carotid or Jugular. As we say around here,
"Bad Thing."
A lot of people that speak of disarming a knife and stripping it, well, a lot of that came from cutting them to dysfunction and then stripping it out, not empty handed stripping and popping it out using the leverage provided by the flat of the blade, etc.
This goes back to what Marc said about culture and modern day America.
A lot of people talk about disarming knives, stripping them, etc., very interesting.
Take a Biker or a Convict that has been lifting weights for a long time. I have to sit here and wonder how some folks come to the conclusion that you are going to defeat his grip even using Bio-Mechanical Leverage in some instances. Some of these guys have just sat in the joint for 6 months to 12 years, or they are actively participating in weight lifting as a free hellraiser...they have had their hands around a piece of steel that has a couple hundred pounds to a few hundred pounds of weight on it. They are used to holding that bar. Not only are they huge and have immense strength, they have immense grip strength without even addressing that in their training, it is a by-product of lifting weights in general.
Now, some of these people are teaching women and smaller guys to try and defeat that. Cultural reality meets fantasy head-on.
This also goes back to the drills, muscle memory, what if the guy is just very strong and blows your centerline. Bad Thing.
I don't know all the anwers, but I know this stuff has to be modified.
The points made about being able to get the knife out are also true.
You have to be serious if you are going to carry a knife for self-defense, the sheaths and carry systems have become more concealable and subtle and the sheaths faster on the draw. The folders have become more accessible (pocket clip) and much faster, using various one-hand, or "no-hand" opening devices.
All of this helps, it aids people that are serious about this. You still have to practice, and you have to practice dry like with a handgun until you can do it safely, then you have to draw under stress...you have to learn to evade away from the attacking line before or during the draw. This takes a lot of training, a lot of training is an understatement.
Bob Kasper has some damned good ideas about the reality of using a knife for self-defense...and he most certainly has the right idea about being able to defend yourself before or during the draw. Because as you guys state clearly and accurately, a lot of times, the sh*t has already hit the fan.
Oh yeah, Richard, most definitely, if at all possible, the attacker should feel the steel before they see it. Words to live by. Especially when it comes to Multiple Attackers, don't show them the Trump Card.