The German physicist Georg Christoph Lichtenberg discovered what are today known as Lichtenberg figures. These fractal-like figures are formed when electricity moves through an insulating medium. The electric current tries to find the best route to flow through the medium and in doing so creates multiple branches similar to the pattern made by the roots of trees. Lichtenberg figures are often generated when lighting strikes things such as a golf course or even the human body! The Lichtenberg figures produced in the skin after a person gets hit by lighting are not a burn. They are produced as a result of degradation of the skin with leakage of red blood cells to the superficial layers and normally fade within a few days. If you have the stomach for it, you can check some Lichtenberg figures produced in the bodies of people struck by lightning by clicking on this link. Lichtenberg figures are also used to produce awesome art as shown in the video below.