Found this while stumbling check it out:
When Albert Einstein was making the rounds of the speakerâ€™s circuit, he usually found himself eagerly longing to get back to his laboratory work. One night as they were driving to yet another rubber-chicken dinner, Einstein mentioned to his chauffeur (a man who somewhat resembled Einstein in looks and manner) that he was tired of making speeches.
â€œI have and idea, boss,â€ his chauffeur said. â€œIâ€™ve heard you
give this speech so many times. Iâ€™ll bet I could give it for you.â€
Einstein laughed loudly and said, â€œWhy not? Letâ€™s do it!â€
When they arrive at the dinner, Einstein donned the chauffeurâ€™s cap and jacket and sat in the back of the room. The chauffeur gave a beautiful rendition of Einsteinâ€™s speech and even answered a few questions expertly.
Then a supremely pompous professor asked an extremely esoteric question about anti-matter formation, digressing here and there to let everyone in the audience know that he was nobodyâ€™s fool.
Without missing a beat, the chauffeur fixed the professor with a steely stare and said, â€œSir, the answer to that question is so simple that I will let my chauffeur, who is sitting in the back, answer it for me.â€