In television commercials, several passages have become clichéd, particularly the opening of Richard Strauss' Also sprach Zarathustra (made famous in the film 2001: A Space Odyssey) and the opening section "O Fortuna" of Carl Orff's Carmina Burana, often used in the horror genre; other examples include the Dies Irae from the Verdi Requiem, Edvard Grieg's In the Hall of the Mountain King from Peer Gynt, the opening bars of Beethoven's Symphony No.