If you want to freeze action, which shutter speed range is guaranteed to do so effectively?
A. 1/15-1/30
B. 1/30-1/60
C. 1/60-1/80
D. 1/80-1/125

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.