I'm looking for some nice examples of knee-to-the-head KO's by notable fighters but can't find them. Are there any? Also, is there any reason why all I could find was 1) performed by westerners 2) in some seemingly irrelevant low-level bouts? It looks to me like either there's some gentlemen's agreement in Thai scene not to throw such strikes, or they are practically impossible if your opponent is good enough in clinch (i dunno really, those are my wild guesses). Or are they just banned?