I went to see this film tonight and really enjoyed it. I knew the book it was based on discussed the late Hwa Rang Do expert and Special Forces sergeant Michael Echanis in some detail. I remember getting his "secret" knife-fighting, knife-defense, and stick-fighting books in the 1970s. The movie featured a brief scene on a character based on him (seen only in flashback). It was a comedy and so it was played for humor. Among other things, the character developed his own knife-fighting style that involved leaping at the opponent in an almost pro-wrestling style flying press, a knife in either hand. There were several other martial arts related bits, including dim mak used by another character. Anyway, I found it a quite funny movie overall and definitely recommend it!