I have been trying to learn/improve my ability to use this strike in sparring, and hopefully for future fights. I first saw it on the Karate episode of the tv show Human Weapon. http://youtu.be/92i_JqB6ffU?t=25m59s I found a later example in MMA when I recently rewatched John Dodson vs. TJ Dilashaw http://youtu.be/aDmRu9lKHA0?t=4m39s I guess I'm really just wondering if anyone else remembers any other example in modern MMA, or other. I think striking with the ridge, and knife hand are underutilized in MMA; I don't understand why, because those strikes areusing uncovered areas of the gloves. Anyways....karate enthusiast banter welcome in this thread.