Cars and generators that seem to run on water? Sounds impossible! Yet inventors sometimes stumble across a huge energetic phenomena, which they unwittingly attribute to hydrogen, as they explore water electrolyzers, Brown's gas, HHO and hydroxy. This presentation culminates ten years of research and discloses a surprising, new explanation: In an engine's combustion chamber, water nanobubbles or fog particles convert to microscopic ball lightning when subjected to a wide plasma, abrupt electric discharge. For a few milliseconds thousands of tiny plasmoids manifest a huge anomalous force on the piston. The plasmoids self-accelerate due to their coherence with the quantum vacuum's zero-point energy. The behavior mimics a thunderclap. Herein offers an easy success for inventors: Just create the conditions of a thundercloud in an engine's combustion chamber.