A second key musical element in hip hop music is emceeing (also called MCing or rapping). Emceeing is the rhythmic spoken delivery of rhymes and wordplay, delivered at first without accompaniment and later done over a beat. This spoken style was influenced by the African American style of "capping," a performance where men tried to outdo each other in originality of their language and tried to gain the favor of the listeners. The basic elements of hip hop—boasting raps, rival "posses" (groups), uptown "throw-downs," and political and social commentary—were all long present in African American music. MCing and rapping performers moved back and forth between the predominance of toasting songs packed with a mix of boasting, 'slackness' and sexual innuendo and a more topical, political, socially conscious style. The role of the MC originally was as a Master of Ceremonies for a DJ dance event. The MC would introduce the DJ and try to pump up the audience. The MC spoke between the DJ's songs, urging everyone to get up and dance. MCs would also tell jokes and use their energetic language and enthusiasm to rev up the crowd. Eventually, this introducing role developed into longer sessions of spoken, rhythmic wordplay, and rhyming, which became rapping.