Devil's Advocate year end special, which had Karan Johar interviewing Karan Thapar.
http://www.ibnlive.com/news/devils-advocate-special-question-time-for- devil/55297-19-p3.html Karan Johar: Who is a nightmare to interview? Karan Thapar: A R Rehman, because in those days he was exceedingly shy; his long answer was `umm' and his short answer was `um'. Most of his answers were `umm'.