What is (SHC)Spontaneous Human Combustion?

Spontaneous Human Combustion [SHC] is really something which is shrouded in mystery. No one knows what really happens but many times people have been found totally burned while they were just sitting on a chair or something. No one has ever burned like so in presence of another person nor has this phenomena every been really proven or disproven. The combustion may result in simple burns and blisters to the skin, smoking, or a complete incineration of the body. The latter is the form most often 'recognized' as SHC. There is much speculation and controversy over SHC. It is not a proven natural occurrence, but many theories have attempted to explain SHC's existence and how it may occur. The two most common explanations offered to account for apparent SHC are the non-spontaneous "wick effect" fire, and the rare discharge called static flash fires. Although mathematically it can be shown that the human body contains enough energy stored in the form of fat and other tissues to consume it completely, in normal circumstances bodies will not sustain a flame on their own.

Many of the modern SHC stories have originated with police and fire investigators who have been perplexed by partially burned corpses near unburned rugs or furniture. They are completely baffled as to how a body could burn down to ashes except for a leg or a foot, while the rest of the room avoids being consumed by the flames.

Some of the victims of SHC includes:

Jean Lucille Saffin. This 61-year-old mentally handicapped woman burst into flames in her kitchen. "Her father, who was seated at a nearby table, said he saw a flash of light out of the corner of his eye and turned ... to find that she was enveloped in flames, mainly around her face and hands." The fire was put out with water by Mr. Saffin and his son-in-law. No cause of the fire was found. How does this qualify as a case of SHC? Because an unnamed policeman told Saffin's relatives that that's what he believed caused Jean's death. Milton is also impressed by the fact that the father and son-in-law claim the fire lasted only a minute or two (so there should be no surprise that the rest of the room didn't go up in flames!). Milton doesn't consider that the testimony of the father and son-in-law may be tainted.

Helen Conway.Conway was an elderly, infirm woman who was a heavy and careless smoker. (There were many cigarette burns in her room.) She burned up while sitting in an upholstered chair in her bedroom. Why is this considered SHC? The fire chief said that's what he believed. He also said it only took 21 minutes for her to burn.* If it did, the wick effect would not account for how she burned. (Arnold uses some sort of "deduction" to figure out that it may have taken only six minutes for Conway's body to be consumed.) Since they can't figure out how Conway burned up in such a short time, both Arnold and Milton conclude it was probably SHC.

Joe Nickell speculates that the fire "may have begun at the base of the seated body and burned straight upward, fed by the fat in the torso, and may have thus been a much more intense fire - not unlike grease fires that all who cook are familiar with. Indeed, in searching through the dense smoke for the victim, an assistant chief sank his hand "into something greasy" that proved to be the woman's remains.

source: The source of article was taken from reffering many sites on internet