One of my training partners, who has had quite a bit of experience under Dan Inosanto and Paul Vunak, has been attacked twice in the last year or two. The first time he was jumped by four gang bangers trying to rob him outside a check cashing facility. He used a straight blast to push back the first, head butted the second, elbowed the third, and was staggered by a nasty right cross from the fourth. Sent him to the hospital, but no permanent injury (they took off---didn't rob him or stomp him).
About a year later a gang banger sucker punched him and he dropped to his knees. The scumbag was trying to kick him but he popped up, grabbed the guy's ears, and smashed his face with a headbutt. There was a big spray of blood as the bad guy's nose broke, and the dirtbag ran off.