As a follow up to the last video, here is an example of two "experts" showing an irresponsible technique.
I'm not into trashing individual styles, as quite often it's the practitioner or instructor that makes the style, not the style itself. However, I will address this particular technique sequence. Notice that this is done with absolutely zero intensity or realism. The attack slowly lunges forward and then freezes. Why would he do this? He doesn't with draw his hand and try to stab again (reality) which would in effect cancel the following up joint manipulation into the hammerlock. I also seriously doubt he'd be able to stab his assailant in the back, or strip the knife so easily.
This is why we MUST train with intensity and energy! I don't know who these two gentlemen are, but I'm sure they think they're doing the right thing and teaching quality self defence. But quite simply, trying this will get someone killed! This is one of the reasons why the entire Progressive Defence team, as well as all of our recommended trainers, pressure test every technique before teaching it to anyone else. We need to be sure it works.
Please keep this in mind next time you think you're learning an awesome technique that is sure to impress your friends. Often it's the unimpressive techniques that work.