Jackie Chan went to Northern China once to learn an ancient technique from some Monks. To learn this style he had to sign a contract that he himself would never portray it on film. So Jackie goes, learns, then teaches this style to several other Martial artists. Some of higher rank than himself. Then he goes on to direct this film, his first directed film ever, he does not star in it, but it was phenomenal. The film was The Thirty Six Crazy Fists.