I went to San Francisco, and because I had twenty Russian stamps in my passport I was grilled for ages by the immigration official, who then tried to catch me out 'Great Escape' style by asking me questions in Russian. Given that my Russian consists of three words ('Yes', 'No' and 'Blowjob') I didn't have a clue what he was on about. He eventually, reluctantly, allowed me in. Bizarre in the least!