The twin-machine gun; one of the few anti-aircraft weapons available for German ground forces.

Mounted Twin-Machine Gun

Briefing between an infantry unit and assault gun commanders before opening an attack operation, Eastern Front. Center: Battalion commander, Major Vielhauer (knights cross award) September 1943. 

Briefing between commanders

It is not mud, but Mother Nature can strike back in different ways... A German car got stuck in the soft sandy soil and the driver is trying to free it by jacking it up. There is no information on the location.