Spontaneous human combustion
Spontaneous human combustion (SHC) is a term for the concept of the combustion of a living (or recently deceased) human body without an apparent external source of ignition. In addition to reported cases, descriptions of the alleged phenomenon appear in literature, and both types have been observed to share common characteristics in terms of circumstances and the remains of the victim.
Forensic investigations have attempted to analyze reported instances of SHC and have resulted in hypotheses regarding potential causes and mechanisms, including victim behavior and habits, alcohol consumption and proximity to potential sources of ignition, as well as the behavior of fires that consume melted fats. Natural explanations, as well as unverified natural phenomena, have been proposed to explain reports of SHC. Current scientific consensus is that most, and perhaps all, cases of SHC involve overlooked external sources of ignition.
"Spontaneous human combustion" refers to the death from a fire originating without an apparent external source of ignition; the fire is believed to start within the body of the victim. This idea, and the term "spontaneous human combustion", were both first proposed in 1746 by Paul Rolli in an article published in the Philosophical Transactions concerning the mysterious death of Countess Cornelia Zangheri Bandi. Writing in The British Medical Journal in 1938, coroner Gavin Thurston describes the phenomenon as having "apparently attracted the attention not only of the medical profession but of the laity one hundred years ago" (referring to a fictional account published in 1834 in the Frederick Marryat Cycle Series). In his 1995 book Ablaze!, Larry E. Arnold wrote that there had been about 200 cited reports of spontaneous human combustion worldwide over a period of around 300 years.
The topic received coverage in the British Medical Journal in 1938. An article by L. A. Parry cited an 1823-published book Medical Jurisprudence, which stated that commonalities among recorded cases of spontaneous human combustion included the following characteristics:
"[...]the recorded cases have these things in common:
- the victims are chronic alcoholics;
- they are usually elderly females;
- the body has not burned spontaneously, but some lighted substance has come into contact with it;
- the hands and feet usually fall off;
- the fire has caused very little damage to combustible things in contact with the body;
- the combustion of the body has left a residue of greasy and fetid ashes, very offensive in odour."
An extensive two-year research project, involving thirty historical cases of alleged SHC, was conducted in 1984 by science investigator Joe Nickell and forensic analyst John F. Fischer. Their lengthy, two-part report was published in the journal of the International Association of Arson Investigators,:3–11 as well as part of a book. Nickell has written frequently on the subject, appeared on television documentaries, conducted additional research, and lectured at the New York State Academy of Fire Science at Montour Falls, New York, as a guest instructor.
Nickell and Fischer's investigation, which looked at cases in the 18th, 19th and 20th centuries, showed that the burned bodies were in close proximity to plausible sources for the ignition: candles, lamps, fireplaces, and so on. Such sources were often omitted from published accounts of these incidents, presumably to deepen the aura of mystery surrounding an apparently "spontaneous" death. The investigations also found that there was a correlation between alleged SHC deaths and the victim's intoxication (or other forms of incapacitation) which could conceivably have caused them to be careless and unable to respond properly to an accident. Where the destruction of the body was not particularly extensive, a primary source of combustible fuel could plausibly have been the victim's clothing or a covering such as a blanket or comforter.
However, where the destruction was extensive, additional fuel sources were involved, such as chair stuffing, floor coverings, the flooring itself, and the like. The investigators described how such materials helped to retain melted fat, which caused more of the body to be burned and destroyed, yielding still more liquified fat, in a cyclic process known as the "wick effect" or the "candle effect".
According to Nickell and Fischer's investigation, nearby objects often remained undamaged because fire tends to burn upward, but burns laterally with some difficulty. The fires in question are relatively small, achieving considerable destruction by the wick effect, and relatively nearby objects may not be close enough to catch fire themselves (much as one can closely approach a modest campfire without burning). As with other mysteries, Nickell and Fischer cautioned against "single, simplistic explanation for all unusual burning deaths" but rather urged investigating "on an individual basis".:169
A 2002 study by Angi M. Christensen of the University of Tennessee cremated both healthy and osteoporotic samples of human bone and compared the resulting color changes and fragmentation. The study found that osteoporotic bone samples "consistently displayed more discoloration and a greater degree of fragmentation than healthy ones." The same study found that when human tissue is burned, the resulting flame produces a small amount of heat, indicating that fire is unlikely to spread from burning tissue.
Some hypotheses attempt to explain how SHC might occur without an external flame source, while other hypotheses suggest that incidents that might appear as spontaneous combustion did in fact have an external source of ignition – and that the likelihood of spontaneous human combustion without an external ignition source is quite low. Benjamin Radford, science writer and deputy editor of the science magazine Skeptical Inquirer, casts doubt on the plausibility of spontaneous human combustion, "If SHC is a real phenomenon (and not the result of an elderly or infirm person being too close to a flame source), why doesn't it happen more often? There are 5 billion [The world's population reached 5 billion in 1987] people in the world, and yet we don't see reports of people bursting into flame while walking down the street, attending football games, or sipping a coffee at a local Starbucks." Paranormal researcher Brian Dunning states that SHC stories "are simply the rare cases where a natural death in isolation has been followed by a slow combustion from some nearby source of ignition." He further suggested that reports of people suddenly aflame should be called "Unsolved deaths by fire", stating that an unknown cause did not necessarily imply that the fire lacked an external ignition source.
- Almost all postulated cases of SHC involve persons with low mobility due to advanced age or obesity, along with poor health. Victims show a high likelihood of having died in their sleep, or of being unable to move once they had caught fire.
- Cigarettes are often seen as the source of fire, as the improper disposal of smoking materials causes one in every four fire deaths in the United States. Natural causes such as heart attacks may lead to the victim dying, subsequently dropping the cigarette, which after a period of smouldering can ignite the victim's clothes.
- The "wick effect" hypothesis suggests that a small external flame source, such as a burning cigarette, chars the clothing of the victim at a location, splitting the skin and releasing subcutaneous fat, which is in turn absorbed into the burned clothing, acting as a wick. This combustion can continue for as long as the fuel is available. This hypothesis has been successfully tested with animal tissue (pig) and is consistent with evidence recovered from cases of human combustion. The human body typically has enough stored energy in fat and other chemical stores to fully combust the body; even lean people have several pounds of fat in their tissues. This fat, once heated by the burning clothing, wicks into the clothing much as candle wax (which typically was originally made of animal fat) wicks into a lit candle wick to provide the fuel needed to keep the wick burning. The protein in the body also burns, but provides less energy than fat, with the water in the body being the main impediment to combustion. However, slow combustion, lasting hours, gives the water time to evaporate slowly. In an enclosed area, such as a house, this moisture will recondense nearby, possibly on windows. Feet don't typically burn because they often have the least fat; hands also have little fat, but may burn if resting on the abdomen, which provides all of the necessary fat for combustion.
- Scalding can cause burn-like injuries, sometimes leading to death, without setting fire to clothing. Although not applicable in cases where the body is charred and burnt, this has been suggested as a cause in at least one claimed SHC-like event.
- Brian J. Ford has suggested that ketosis, possibly caused by alcoholism or low-carb dieting, produces acetone, which is highly flammable and could therefore lead to apparently spontaneous combustion.
- SHC can be confused with self-immolation as a form of suicide. In the West, self-immolation accounts for 1% of suicides, while Radford claims in developing countries the figure can be as high as 40%.
- Sometimes there are reasonable explanations for the deaths, but proponents ignore official autopsies and contradictory evidence, in favor of anecdotal accounts and personal testimonies.
- Mast cell researcher Lawrence Afrin, M.D. posits that a rare condition called Mast Cell Activation Syndrome (MCAS) may be the cause of the phenomenon. In MCAS, mast cells spontaneously release over 200 inflammatory molecules known as mediators, including the substance norepinephrine. Afrin describes a case report of a man with MCAS who grew ill and appeared to "smoke" in the presence of several witnesses. Afrin writes that the release of large amounts of norepinephrine, or perhaps another mast cell-derived substance, could turn on a regulatory protein called UCP-1 in greater-than-normal amounts. UCP-1 causes adipose oxidization to be released as heat. Adipose tissue is a known repository of mast cells. Under the right circumstances, a sudden flood of norepinephrine released from adipose mast cells could activate the UCP-1 "switch" and cause heat generation in excess of 90 degrees Celsius. Once the adipose tissue was ignited, it would in theory burn itself out, inclusive of bone marrow. 
Pseudoscientific and fictional theoriesEdit
- Larry E. Arnold in his 1995 book Ablaze! proposed a pseudoscientific new subatomic particle, which he called "pyrotron".:99–106 Arnold also wrote that the flammability of a human body could be increased by certain circumstances, like increased alcohol in the blood.:84 He further proposed that extreme stress could be the trigger that starts many combustions.:163 This process may use no external oxygen to spread throughout the body, since it may not be an "oxidation-reduction" reaction; however, no reaction mechanism has been proposed. Researcher Joe Nickell has criticised Arnold's hypotheses as based on selective evidence and argument from ignorance.
- In his 1976 book Fire From Heaven, UK writer Michael Harrison suggests that SHC is connected to poltergeist activity because, he argues "the force which activates the 'poltergeist' originates in, and is supplied by, a human being". Within the concluding summary, Harrison writes: "SHC, fatal or non-fatal, belongs to the extensive range of poltergeist phenomena."
- John Abrahamson suggested that ball lightning could account for spontaneous human combustion. "This is circumstantial only, but the charring of human limbs seen in a number of ball lightning cases are very suggestive that this mechanism may also have occurred where people have had limbs combusted," says Abrahamson.
On 2 July 1951, Mary Reeser, a 67-year-old woman, was found burned to death in her house after her landlady realised that the house's doorknob was unusually warm. The landlady notified the police, and upon entering the home, they found Reeser's remains completely burned into ash, with only one leg remaining. The chair she was sitting in was also destroyed. During the investigation, detectives found that Reeser's temperature was around 3,500 °F (1,930 °C; 2,200 K), which puzzled the investigators, as almost everything else in the room in which Reeser was found remained intact. Reeser took sleeping pills and was also a smoker. A common theory was that she was smoking a cigarette after taking sleeping pills, and then fell asleep while still holding the burning cigarette, which could have ignited her gown, ultimately leading to her death. Investigators also found that the fire had burned a socket, which stopped a clock at 2:26am, suggesting that Reeser had died at around that time.
Margaret Hogan, an 89-year-old widow who lived alone in a house on Prussia Street, Dublin, was found burned almost to the point of complete destruction on 28 March 1970. Plastic flowers on a table in the centre of the room had been reduced to liquid and a television with a melted screen sat 12 feet from the armchair in which the ashen remains were found; otherwise, the surroundings were almost untouched. Her two feet, and both legs from below the knees, were undamaged. A small coal fire had been burning in the grate when a neighbour left the house the previous day; however, no connection between this fire and that in which Mrs. Hogan died could be found. An inquest, held on 3 April 1970, recorded death by burning, with the cause of the fire listed as "unknown".
Henry Thomas, a 73-year-old man, was found burned to death in the living room of his council house on the Rassau estate in Ebbw Vale, South Wales, in 1980. His entire body was incinerated, leaving only his skull and a portion of each leg below the knee. The feet and legs were still clothed in socks and trousers. Half of the chair in which he had been sitting was also destroyed. Police forensic officers decided that the incineration of Thomas was due to the wick effect.
In December 2010, the death of Michael Faherty in County Galway, Ireland, was recorded as "spontaneous combustion" by the coroner. The doctor, Ciaran McLoughlin, made this statement at the inquiry into the death: "This fire was thoroughly investigated and I'm left with the conclusion that this fits into the category of spontaneous human combustion, for which there is no adequate explanation."
The most recent reported case of apparent SHC occurred in the early afternoon of 17 September 2017 in Tottenham, north London, when a 70-year-old pensioner, John Nolan from County Mayo in Ireland, appeared to spontaneously burst into flames while walking in the street. Some passers-by tried to help him at the scene and he was airlifted to hospital where he died the next day, having suffered severe third-degree burns on 65% of his body. At the time, investigators were unable to establish a reason for this incident and his death was treated as unexplained. An inquest was opened at North London Coroner's Court in March 2018, to further examine the circumstances of his death. The coroner concluded that Mr. Nolan accidentally set fire to himself while lighting a cigarette and the cause of death was given as "accidental ignition of clothing".
- In the 1834 novel Jacob Faithful by Captain Frederick Marryat, the narrator's mother, a gin-soaked alcoholic, "perished in that very peculiar and dreadful manner ... from what is termed spontaneous combustion, an inflammation of the gases generated from the spirits absorbed into the system."
- In the 1798 novel Wieland by Charles Brockden Brown, the father of the narrator is found largely burned by what appears to be spontaneous combustion and dies soon after.
- Dead Souls (1842), a novel by Nikolai Gogol, mentions a craftsman who dies in a flame. Upon further questioning from Chichikov, Mme Korobochka laments the craftsman's heavy drinking, which rendered him "soaked in alcohol" and caused him to all of a sudden "burst from him a blue flame".
- In the comic story "The Glenmutchkin Railway" by William Edmondstoune Aytoun, published in 1845 in Blackwood's Magazine, one of the railway directors, Sir Polloxfen Tremens, is said to have died of spontaneous combustion.
- In the novel Bleak House (1853) by Charles Dickens, the character Krook, Mrs Smallweed's only brother, a disreputable rag-and-bottle merchant who lives largely on gin, is the apparent victim of spontaneous human combustion.
- In the 1984 mockumentary This Is Spinal Tap, about the fictional heavy metal band Spinal Tap, two of the band's former drummers are said to have died in separate on-stage spontaneous human combustion incidents.
- The 1990 horror film Spontaneous Combustion, directed by Tobe Hooper, attempts to connect spontaneous combustion with atomic weapons experimentation.
- In the Television Show Picket Fences (season 2, episode 2 "Duty Free Rome") Bill Pugen, the Mayor of Rome Wisconsin, dies as the result of Spontaneous Combustion while appealing his murder conviction.
- In the beginning of the 1998 video game Parasite Eve, an entire audience in the Carnegie Hall spontaneously combusts (except for Aya Brea, the protagonist of the game) during an opera presentation as the main actress Melissa Pierce starts to sing.
- In the episode "Spontaneous Combustion" (April 1999) of the American cartoon show South Park, several characters die from spontaneous human combustion. It is later discovered that it is the result of people holding in their farts. In the DVD commentary for the episode, Trey Parker reveals that flatulence causing spontaneous combustion in the episode stemmed from his own serious belief that holding in farts can indeed cause humans to spontaneously combust. Parker said, "I honestly think it could be what spontaneous combustion is because I've seen some dudes light their farts, and the fireballs were big. And that was just one fart. I'm serious, I think it's totally possible."
- In the anime Nanbaka, the character Musashi suffers a condition labeled as spontaneous human combustion by multiple characters and is shown in a flashback to have been diagnosed with it after bursting into flames just outside his school.
- Episode 17 of Season 1 of the television show CSI: Crime Scene Investigation has a subplot concerning a woman who burns while sitting in her chair in her living room. Character Sara Sidle wants to call it SHC, but character Warrick Brown is determined to prove there is no such thing.
- On the second episode in season 2 of the sitcom Trial & Error, the character Anne Flatch (played by Sherri Shepherd) mentions that she suffers from the condition when her colleague Dwayne Reed (Steven Boyer) notices smoke coming from her right arm.
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