For me it is the fact that our blood contains iron. I earlier used to believe the word stood for some ‘organic element’ since I couldn’t accept we had metal flowing through our supposed carbon-based bodies, till I realized that is where the taste and smell of blood comes from.
For the car to be “running” in those cases, the engine just needs to be turning to keep the alternator and potentially the power steering pump going. When engine braking, the rotation of the tires is locked to the rotation of the engine, so the inertia of the car keeps the engine turning without needing to use fuel.
Depends on the ignition system and everything of course, but it can be true.