What? I am not very willing to be tenderized by a knife, no way. But yes, I watched a documentary about this and it has been a practice not even in Taiwan but in China and Japan too, although on the latter, the practice was discontinued. It is called the Daoliao. There are people who are doing the practice and for 10 minutes you will be tenderize by the blunt edges of the knife. It said to remove the bad energy of the body because of the steel knives. Some of the reviews are from the people who bravely tried to be tenderized. They said that it improves the circulation of the blood. I have to agree because they are chopping fakely using the knife. But before you cringe, the victim or the person is covered by a thick sheet so you can just feel something is pushing you, not slicing you.