The idea that someone can randomly combust into flames is a terrifying one, it is a theory that multiple people believe can happen, and others believe can not. Even though some scientists claim there is evidence that this is a true possibility, it is still not one that happens very often, if at all. So usually they will find some other reason that someone randomly died from a fire that seemed to only be contained to their bodies. Like the case of Mary Reeser. The mysterious incident where a woman was caught on fire, and all that was left in the pile of ashes, were questions.