When I was a child, when I watched gangster movies, the main characters in the movies often clicked their fingers. My friends thought it was a very handsome move and followed suit one after another, but they were sternly stopped by their parents, [because they would get arthritis if they broke off too much]. Is this really the case? Physiological Bounce under Normal Conditions When the fingers of adults are suddenly pulled or folded, they often make a crisp burst sound. In fact, this kind of bounce is a normal physiological phenomenon and is caused by gas vibration in the joint cavity. There is a gap between normal joints all over the body, which is called joint cavity. Although it Read More …