Spontaneous Human Combustion (SHC) occurs when a human body bursts into flame from a chemical reaction within, apparently without an apparent external source of ignition. The fire is believed to start within the body of the victim. Almost all 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. The peculiar factor is that though the head and torso are consumed by flames yet the legs and hands remain intact. A few have also survived.