At the airport the other day, I overheard a ticket clerk talking to a passenger who spoke very little English. The clerk was asking the standard question (these days), "Sir, has any stranger given you something to carry on the plane?" The passenger was confused, evidently, by the word "stranger". He just didn't know what she was talking about. Another clerk was brought over and they spoke very distinctly (and loudly) and tried to pantomime the idea of "stranger". Finally, after a couple of minutes of interesting amatuer theater, the guy finally seems to understand. A big smile comes across his face and he tells them: "Women, I am new to America! I have been here only a short time! I do not yet KNOW any strangers!" They gave up and let the guy on the plane.
(From the "Rest" of RHF)