Translated as "Way of the Intercepting Fist", Jeet Kune Do (Jit Kun Do, Jeet Kuen Do...etc) is the unstylish style of martial art. The unstylish way is the real way. It's bound by no rules of any style. Bruce Lee named it Jeet Kune Do.
It's a name you hear thrown about a lot when people talk about martial arts, and he was good at what he did, but what did he really do for you and me?
He made some good movies and shared some interesting philosophy, but just as significantly, he battled with the chinese government to fight for the right to share the secretive art of kung fu with the west and the rest of the world. Bruce Lee made it commonly acceptable to "think beyond the teacher's rules".
Bruce Lee (left): 2 shuffle steps back, then 1 moonwalk step back, then 1 or 2 straight punches.
This clip is from a demo at Long Beach, CA, USA (in 1964 or 1967). Apologies for the poor quality of video, but there are better copies out there for you to find.
An excellent example of rhythm & timing. Bruce shuffles back 2 steps, just staying outside of the opponent's kicking range; then the opponent does two half-spin kicks, not quite reaching their target, as Bruce moonwalks back to maintain perfect range in every split second, ready to return fire from the moment there's an opening.
It's only one step of a moonwalk, but it's the exact same technique as Michael Jackson's classic backslide moonwalk.
Bruce Lee (left): kick between legs, then chain punches
Another video clip from Bruce Lee's demo at Long Beach.
The guy on the right steps in with a classic case of insufficient low-line defence. When the range is right, Bruce strikes between the other guy's leg, immediately followed by about 5 chain punches (called Lin Wan Kuen in Cantonese). See how much it shocks the guy stepping, by seeing how quickly he falls back.