This lecture is an excellent overview of LENR/Cold Fusion from Robert Greenyer at the ICCF meeting in Assisi, Italy, in 2021. At 50:20, you can hear his remarks about how HHO/Ohmasa gas can act like a maser turning the hydrogen gas particles into a coherent form that can cut materials like a laser. (Does anything “paranormal” come to mind?) He shows how metals are instantly transmuted into other elements in when they come into contact with Oxy Hydrogen Gas. A lot of the ideas in this lecture were the basis for Dark Matter Monsters.
Here’s a link to a paper on Sciencedirect.com showing increases in engine efficiency with HHO gas.