Oscar-winning composer AR Rahman was caught off guard recently during the music launch of the upcoming movie Iravin Nizhal. The film’s director Parthiban lost his cool and threw the microphone at the audience leaving Rahman speechless.Parthiban was irked when he was told that his microphone was not working during a conversation with the music maestro. And Parthiban snapped by throwing his microphone at the audience, while shouting, “You should’ve told me at the beginning only.”