Stand-up comedy is an art form that involves a stand-up comic and an audience. Comics perform on a stage and deliver humorous and satirical monologues, sometimes incorporating physical acts. These performances are typically composed of tightly crafted sets or acts, and often include varying degrees of live crowd interaction (crowdwork). Stand-up comedy consists of one-liners, stories, observations, or shticks that can employ props, music, impressions, dialects, magic tricks, or ventriloquism.