This exchange student from Brazil had a really hard time. He comes from a really outgoing, friendly, and straightforward culture that wouldn't really fit the traditional values of the countryside city in which he was living.
Many times, his friendliness and loudness would be seen as rude, even though he was a very polite person. Same goes to his lack of personal space.
One thing that got him into a lot of trouble was his notion of what was offensive or not. He seemed to be very self aware, but he didn't really realize how sensitive people could be to offensive jokes, which caused conflicts constantly to the point of making all parties really upset about what he considered a minor thing and the others a big one.