US President Trump's profanity-laden threat to Iran to open the Strait of Hormuz on social media drew sarcastic responses from Iranian embassies and consulates in several countries. The Iranian Embassy in India stated, "Swearing and insulting are the behavior of a sore loser. Control yourself, old man!" The Iranian Embassy in Zimbabwe released a set of "Presidential Etiquette" guidelines, including "using respectful and restrained language in public speeches" and "behaving with dignity, reflecting the seriousness of one's position." The Iranian Embassy in the UK quoted Mark Twain, saying, "It's better to remain silent and let others doubt your worth than to speak and completely prove yourself a fool." The Iranian Embassy in South Africa appealed to the American public, "To be honest, smart Americans should at least do something to uphold their own dignity." (Jin Shi)