Lancaster & Bf110 G-4
Schräge Musik was the name Germans gave to upward-firing auto cannon that the Luftwaffe mounted in night fighter aircraft.
Night fighters used this device to approach and attack Allied bombers from below, outside the bomber crew's usual field of view or fire.
Most of the Allied bombers types of that era which were used for nocturnal bombing missions (primarily the Avro Lancaster) lacked effective ventral armament,
leaving them easy prey to attacks from below, an advantage the Luftwaffe capitalised on.