This paper by Handel, Grace, and Leitner examines ball lightning discharge phenomena fed by an atmospheric maser. The maser-caviton theory proposes that ball lightning is sustained by coherent microwave amplification (maser action) in the atmosphere, creating a stable plasma sphere or caviton that can persist for extended periods, explaining the observed luminosity, motion patterns, and energy content of ball lightning through a self-sustaining electromagnetic resonance mechanism coupled to atmospheric plasma dynamics.