Por que no te callas?
Tigerhawk asks: "did Juan Carlos help defeat Hugo Chavez?" by telling the Venezuelan President "why don't you shut up" in public? Every strongman must cultivate the appearance of being above common humanity; a being from whose lips pearls of wisdom drop. When a jefe maximo is told to close his piehole in an international forum the incident tends to shatter this image. One commenter says it perfectly:
Students of Spanish may recall that there are two forms of address: the more formal usted, and the familiar tu. The fact that Juan Carlos said "por que no te callas" (using the tu form) added insult to injury. One head of state addressing another would almost always, universally, use "usted", so saying this with tu showed that Juan Carlos thinks of Chavez like an animal or an unruly child.