Which of the following is the type of burn likely to cause the most harm? Burn from fat
Burn from water
Burn from steam
Burn from hot metal

Generally spontaneous human combustion is something that still bewilders some, human combustion happens very rarely and doesn't affect the surrounding areas, so unless you want to set your self on fire, human combustion will remain spontaneous and very rare.

Thom bell , bobby martin , and norman harris .