This has been talked about before actually. And it is something that is just not suppose to be done to a knife. Of course it will fail, The lock is not meant for that kind of use. Its not a hammer, its a knife. There is absolutely nothing wrong with SF, its the user that posted that video that has issues. I have lots of SF variants and i absolutely love frame lock on them. They are rock solid. All of them. If you use them for what they are meant, that is. I did have two birds that had lock fail, something i know for sure will never happen with SF. If you use it and not abuse it. SF is just as good as other knives i own that are much more expensive. No blade play, rock solid and a great great design. I hate this video, its a bad attempt of making SF frame lock look bad.