Is one of the five basic volleyball skills.
it is a ball-handling skill that a player uses to legally contact the ball a level below the waist using forearms as the contact surface

Iagree with the answer above

Prepared to discuss your findings with your teacher or fellow students

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.