Rhythm is an ordered repetition of strong and weak elements at regular or irregular intervals. what does rhythm in a pattern indicate?

Being that rhythm is a combination of elements repeated, but with variations, rhythm within a pattern indicates motion. It is the movement or procedure with uniform or patterned recurrence of a beat, accent, or the like. In visual art, as this can indicate motion, it will give the impression that the image or action is in movement.

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.