The Stomp Is an Effective Martial Art and Self-Defense Technique

I'm often surprised to see people come to the aid of a relative or friend who is on the ground being savagely attacked with half-hearted attempts to pull the aggressor off by the shoulders. I'm reminded of an extremely violent video that was making circles around the Internet where a man was brutally beating and stabbing a woman on a sidewalk of a large metropolitan area with many people standing around not knowing what to do. (And obviously, one person stood there filming the entire incident.)