Microwave Gas Breakdown; also known as the "Plasma Jellyfish": The Plasma Jellyfish: Image of a high power microwave beam forming a breakdown arc in air. Contributors: Yoshiteru Hidaka, Eun Mi Choi, Ivan Mastovsky, Michael A. Shapiro, Jagadishwar Sirigiri, Richard J. Temkin, G. F. Edmiston, Andreas A. Neuber, Y. Oda