During the machine gun duel near the end, the shadow of the camera man's torso, head, and shoulder-held camera are seen right in the foreground on the back of the German machine gunner.
The actors portraying the Germans usually speak in German unless they are in the presence of English or Americans. While tracking the Rat Patrol and in the absence of any English or Americans, Dietrich and his radio officer inexplicably speak in English for a few minutes. Then Dietrich reverts back to German and barks out a few orders.