Many Jeet Kune Do practitioners believe to know what this means, but they don’t really know how important this is in our style. The three landing points is a way to punch consisting in a sequence of fore fist – fore foot – back foot, being in suspense a very short period of time in order to displace all the energy of the punch and the body mass to the target. To reduce that time “flying” is one of the main things to improve this technique. The first thing that goes in that sequence is the fore fist, followed by the fore foot right after that (even if we move forward or not; then, the back foot moves, after the one it comes the impact (we are in the air when impacting). In the moment of the impact, we have our body lined up towards the target. In the end, the fore foot lands followed by the back foot. These landings must be performed with the footpads in the first place and then the heel of the fore foot (because the back foot heel is always up, before and after the punch). This last thing is used to be explained wrong in most of the places and books that I am not going to tell.
Juan Jiménez in the right moment of back foot landing
The alignment of the punch and the position of the fist depend on the type of punch we are performing, but in any case the impact must always get 5 cm further than the position of the target, so it becomes more powerful.
With no speed of execution (both ways: from position to the target and the way back of the fist after the punch), this technique doesn’t work very well. The explosive forward motion and power are given by speed, and that’s because Jeet Kune Do is a scientific martial art. As the Newton’s second law claims, force = mass by acceleration(F=ma). Bruce Lee had a light body and capable of generate an amazing punching power so, why is that? How can that be possible? If we have little mass, acceleration is needed if we want to earn force.
Since at the beginning it’s convenient to train it exaggerating the motion with a big jump, this is, staying in the air for longer than usual, to explain the three landing points it’s more difficult than to perform it. Non-JKD practitioners accuse us of being unprotected in the moment of impact due to that moment “floating” in the air so we could run the risk of being hit. As an answer to this, it’s enough to watch the right performing of those three landing points to realize how short is the time we are in the air and, therefore, how ridiculous that argument is."