This paper by Handel and Splett examines the humming and motion of ball lightning Part 3, focusing on experiments on the maser-soliton theory and a new cloud electrification process, presented at the VI International Conference "Atmosphere, Ionosphere, Safety". The research proposes laboratory experiments to test the maser-caviton ball lightning model and connects ball lightning physics to broader atmospheric electrical phenomena, discussing how the polarization catastrophe mechanism of cloud electrification relates to conditions favorable for ball lightning formation.