During WW2 the Germans had two weapon systems that were known as Kugelblitz (Ball Lightning) in 1945. One was the first dedicated enclosed Flakpanzer with a ball turret and twin 37mm guns and the other was made by the Zeppelin Werke as an improvement over one of the Foo Fighters; specifically, the WNF Feuerball (Fireball) flattened turbojet attack disc that used a chemical burn to create an electrostatic field around bomber engines and airborne radars, knocking them out. Those machines were guided form the ground and then used plume sensors to get to the bomber stream. The Kugelblitz was an enlarged Feuerball able to take a LW pilot and incorporating Messerschmitt's electrostatic gun AND an ejector gun for use of gaseous explosives first pioneered by Austria in 1936*. The disc body was enlarged and a hemispherical cockpit placed in the middle. A total reaction turbine was installed after the LOX turbine of the F.F.K.F. failed (built by the Kreislaufbetrieb und Fahrzeugmotor D.W). The craft underwent tests and then in one single incent over Garda Lake it attacked a group of B-24 Liberators using the ejector gun to create a dense cloud of gaseous explosives that destroyed several bombers that flew through it! After that it was taken back to the ZW and dismantled.

*actually in WW1 the Germans devised several other gases that never made it to the field. Some were agitating to force evacuation of trenches but one grande scheme (devised when tanks appeared) involved a line of gas cylinders on the German side with piping that would pump liquid gas into a breeze blowing over to the other trench. When the valves would be opened a huge explosive gas cloud would form and would envelope the area, destroying the new tank engines and other motor vehicle engines but would not harm soldiers. This was 1918 and it was never put to the test although the hardwre had been manufactured. The Kugelblitz used the same form of destructive cloud in 1945.