This is pretty cool. A video showing slow-motion shooting from an Easy 8 76 mm and a Rusky 152 mm gun. Watch that and tell me how you wouldn't spot a tank shooting behind a bush...
Also shows no WWII gunner would try for a cupola shot. C'mon, real gunners used american white stars and german crosses for aiming points. They sure as hell weren't aiming for lower plates hidden in grass and bushes either.