One of my old professors liked to tell the story of a visit to (then) communist Poland. His wife was translating as they went through the exit interview. The border guard asked what they were taking pictures of, and he answered (in English) "the usual, Bridges, military installations, etc." The border guard quickly replied, also in English, "Bridges and Military installations?".
The professor thought to himslef, "Tell me that I just learned to understand Polish!"
After much harrassment, they were allowed to go. Of course, the film in his camera was removed.
A bit off topic, but I thought I would add this.