My high school orchestra director was frustrated. Too many students weren't paying attention one day, so he told the class, "I must not be getting through to you in English. What language would you like me to speak? I know French, Spanish, German...I'm not fluent in Italian, but I can get by. So, what language should I be speaking?"
Everyone quieted down and paid attention to Mr. D.'s instructions, in English, after that.
