Every production vehicle caries enough stored/potential energy to throw you down the road at 100mph for many miles. It does not matter how the energy is stored petrochemical, battery, fusion, etc -- release a large portion of that potential energy all at once and SOMETHING will be on fire
Most consumers have not seen an electrical fire up close, so I understand how they can get trapped by the false idea that "no fire in the engine" == "nothing to burn".