Fractal burning, Lichtenberg burning or wood fracking refers to a technique where a Lichtenberg figure is burnt into wood using high voltage electricity.
[1] The danger lies in the process relying on high voltages,[1][3][4][6] much higher than normal mains electricity.
[4] High voltages enable a potentially fatal current to pass through the body.
[4] Transformers from microwave ovens are frequently used for the technique because they are easily obtainable.
[9] A 2020 review noted that the mortality rate of fractal wood burning cases was "significant" and "exceedingly high".