Paul Vunak is a California-based martial artist and known as the founder of Progressive Fighting Systems (PFS).
By fourteen, he had achieved his first black belt in Taekwondo. Paul began to explore other styles such as Kenpo and Hung Gar (Tiger Crane) Gung Fu. Within three years, he had earned another black belt (in Kenpo). In August 1976, the school where Paul studied Kenpo closed and he enrolled in Dan Inosanto's Filipino Kali Academy, achieving the rank of Full Instructor in Jeet Kune Do/Kali in July 1988.
Vunak teaches his version of Jeet Kune Do (JKD) under the name of Progressive Fighting Systems. It is widely regarded as a street-effective system known for its emphasis on headbutts, knees, and elbows thrown from trapping range (most notably, the clinch). These techniques form the basis of the system's Rapid Assault Tactics (RAT) program. Typically the stick and knife are also taught, with techniques drawn from the Filipino martial art of Kali.
Vunak emphasizes that Jeet Kune Do is not about superior technique but about the development of efficient fighting and superior attributes. He states that there is no superior technique in martial arts, only superior training methods. The techniques of JKD, as Vunak states, are drawn from many martial arts. The goal is to use a technique for only a short period until the range or situation changes and calls for a better technique (possibly from a different art); even the signature Wing Chun straight blast and headbutt techniques are only to be used for as long as the situation warrants.