One theory of cave paintings is that they are related to the practice of shamanism.

Whats the question and i might be able to help better?

A. true.  abstract art depicts faithfully what the eye sees.

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.