The book Showdown in Oakland is the most comprehensive account of the fight between Grandmaster Wong Jack Man and the late Bruce Lee. An in depth background is included, of all involved and the events surrounding the fight. Master Rick Wing knows and has meet most of the witnesses, and has an in depth background in the Martial Arts. This is an essential work for anyone interested in the fight and I highly recommend it.In the book Showdown in Oakland, it is written that Wong Sifu was known to have unusually hard bones in his shins and arms.My teacher Grandmaster Wong Jack Man had developed a high level of internal hardness that I could feel when I would push hands with him called 'Cotton Over Steel'; and that is what his arms felt like. This is at the highest level of Internal Martial Arts, and have only felt it with one other person, my teacher the late Grandmaster Joseph Greenstein, the Mighty Atom' listed multiple times in the "Believe It or Not" cartoons and the 1976 Guinness Book of World Records.Internal Martial Arts hardens the bones:the attached picture shows the drill-probe that was bent while a doctor was taking a sample of my hip, he had never seen anything like it.Bruce Lee also studied martial arts at Loyola University, his teacher Dr. William Upton-Knittle had this comment: 'I must point out here that the true reason Bruce (who was my student when he lived in Culver City and I was chief instructor of martial arts at Loyola University) started Jeet Kune Do was because he was unable to achieve instructor rank in ANY form of martial art.....so he went out and took bits and pieces and created his own.I also have the first article he ever wrote for publication (for me when I was associate editor at Black Belt magazine). It was so poor we sent it back, an act that angered him to no end at that time. But once he moved here to get into movies and TV he realized he had no power ..... speed but no results. That's what he wanted from me....There is an internal side to the martial arts....esp. the Chinese arts which later were streamlined by the Japanese who lost the sense of internal until ch'an came to Japan as zen and they saw it as the perfect paradox of internal skill and killing.......but it is not what most are being taught today. It all changed in the mid 60s when people outside the Asian communities began to learn about martial arts....then came the prostitution, phony rankings, made-up school names and everything else that makes true MA so difficult to find these days. b (Ven. Dr. An Tzu; Thich An Tri) 'By Dr. William Upton-Knittle (Dr. William Upton-Knittle, senior coordinator of the UCLA Office of Summer Sessions Advertising and Marketing, was invited by government officials of the People's Republic of China to help plan fund-raising for a project known as the Dr. Sun Yat-sen Victory Memorial.)From the book Axe Hand; Hsing-I & Internal Energy Workout.Axe Hand; Hsing-i & Internal Strength WorkoutDr. William Upton-Knittle also taught the Developemental Psychology of the world renown Jean Piaget. He is also listed in Who's Who in America three times. We had a number of discussions about Bruce Lee, in the late 1990s.There was a strong Japanese influence in Bruce Lee, since his main sparring partner and closest friends was Taki Kimura. Taki Kimura, delivered the eulogy at Bruce Lee's funeral. Bruce Lee's style is called Jeet Kuen Do, Do, is a Japanese term for school, or path. Many people Jeet Kuen Do are unfamiliar with some of the higher level Japanese sparring methods, and assume Bruce Lee invented them, when introduced to them for the first time in Jeet Kuen Do. Even some Shotokan associations, at their higher levels, have some soft, and/or internal methods."Bruce Lee, and thus JKD was heavily influenced by Western boxing and fencing. Although the backbone concepts (such as centerline, vertical punching, and forward pressure) come from Wing Chun, Lee stopped using the Wing Chun stances in favor of what he considered to be more fluid/flexible fencing and boxing stances."Most empty hand martial artists are unfamiliar with the boxing and fencing stances as applied to sparring, so they assume they are unique to Jeet Kuen Do, which is a mistake. " from Wike pediaBruce Lee's martial background was not traditional Chinese Kung Fu, even his study under Wing Chun's Yip Man, was less than two years. Yip Man did not consider Bruce Lee a serious student.Advanced martial techniques and energies, are based on a continual regimen of training lasting decades. Bruce Lee never studied at any school long enough to take advantage of this. Bruce Lee ended up spending much time 'reinventing the wheel'.Any techniques in Bruce Lee's style were based on only his experience. Some have used Thai Boxing, and Filipino Martial Arts with Jeet Kun Do; but since there has never been any world class Martial Artist to have been produced by Jeet Kun Do alone, it is questionable whether any of Bruce Lee's self taught methods, are of any use to anyone else, except as basic self defense.Greg Hayes