A practitioner learns how to generate an undulation wave.
This is passed throughout your entire structure, storing and releasing kinetic energy.
We develop this wave by learning whole-body movement. Every strike involves every body part moving as one.

The skill cannot be attained by force.
Only when the body has augmented itself with neigong will fa jing emerge without effort.
You need to be soft and relaxed.
You need to let go of your tension.

The fa jing release of energy is akin to a sneeze; the entire body opening and closing in an instant.

In self defence practice, we cannot use fa jing on one another. The outcome is too unpredictable.
We use soft target pads and sticks for fa jing practice.

The gravity component of fa jing is trained separately. We strike one another using gravity in order to develop this skill.