If the project is in fact "very exciting," maybe you should respond in kind. Humor them. Rent a rock star costume and wear it to the interview. Gently explain how you were moved by the job description but that there was this one part which seemed pretentious to you. Be honest. Tell them you cringed when you saw the words "rock star." Then, with all the drama you can muster, tear off your uniform facade and reveal the person you are underneath. Or at least the person you are in clothing suitable for a job interview.