Frank Gorshin (The Riddler on Batman) wears his goggles inside the German tank upside-down most of the episode. Update: the goggles were already upside-down when he put the German's hat on.
The tanks are M41 Walker Bulldogs, not M18 Hellcats. Also the jeep would likely not have been drivable after hitting a mine.
They could have just pushed the Jeep back on it's wheels. Great episode.
The "German tanks" shown are actually US made M-18 Hellcat tank destroyers with German markings.,