Zimmer is also noted for his work on the scores of Christopher Nolan's "Batman Begins" (2005) and "The Dark Knight" (2008), on which he collaborated with James Newton Howard. For the soundtrack of "The Dark Knight", Zimmer decided to represent the character of The Joker by a single note played on the cello by his long-time colleague Martin Tillman. Zimmer commented "I wanted to write something people would truly hate." The scores for these films were disqualified from receiving Academy Award nominations for Best Original Score due to too many composers being listed on the cue sheet. Zimmer succeeded in reversing the decision not to nominate "The Dark Knight" in December 2008, arguing that the process of creating a modern film score was collaborative and that it was important to credit a range of people who had played a part in its production. Zimmer explained his approach to scoring with other musicians in an interview with "Soundtrack.net" in 2006: