A style of hitting an opponent where you bring your elbow to chest level and your hand to eye level while brining all of your finger tips(including the thumb) together facing foward. When you strike your opponent you keep your elbow in place while striking your hand strongly towards your target. If you have done this properly your hand and arm should look like a crane.
Although this is not a practical fighting method, and is not recomended if you want to win a fight.

When you eat dirt for the first time and leave your family to build a shack in the woods