Just curious if you're also questioning Andrew Demko's integrity. Either the Sebenzas failed because of truly subpar locks or Demko rigged the test by modifying the lock interface. It's not like he came up with some crazy test that can't be replicated or read a lot into nothing. He clamped the blade for safety purposes and pushed down on the handle. You can see just how easily the lock slipped. You can also see how little effort he put into it to get the lock to slip. What, maybe 5-10 lbs of pressure, if that. You bind that blade into something and it wouldn't take much to slip the lock and maybe hurt yourself. Try to stab the knife into something and there's a real chance you'll hurt yourself. It's a total false sense of security. With slip joints you wouldn't try it because there's no sense of security and anyone with some common sense knows it. With a lock, especially with the reputation of a Sebenza, you'd believe there's a safety net. It's not like we're talking about a jarbenza. I'd assume any reputable manufacturer would see a lock failing with maybe 10 lbs of pressure as a failure and either redesign the lock, offer replacements, or offer refunds. That's an engineering failure. Any reasonable person would see that. Shoot, some slip joints are harder to close than at least one of those Sebenzas in that video.
I'll say maybe Demko got a bad batch with screwed up lock interfaces, but even that's hard to believe considering the acknowledged sky high tolerance standards of CRK. And if a CRK fails so easily, maybe that's reason enough to put some decent pressure on ANY knife's lock just to make sure it won't fail if you need to stab into something with some decent force. Leave spine whacks out of it, most of us who use knives with locks want to be able to stab into something without the knife inadvertently closing on our fingers. Stabbing into something requires a moderately strong lock. Not anything crazy, but something reliable and reasonably strong. I'd guess 50 lbs of pressure unless you're a strong person and using everything you have. Maybe that's what should be tested rather than spine whacks and obvious downward force on the handle. Stab into something hard and while stabbing create some twisting motions, up/down and side to side. Maybe that's a more appropriate lock test. I'd hope most of us could wrap our minds around that since nothing but downward slow and steady force or fast and shocking loads are hard for people to grasp the necessity of.