Sanding (dance) the box of rosin before matches to improve his grip. Sims' popularity as a tap dancer and career at the Apollo certainly made him one of the most if not the most influential sand-dancer of all time. Sand dancing was also used by the popular comedic vaudeville trio, Wilson, Keppel and Betty. They spread sand over the stage in one of their most well-known numbers, "Sand Dance". In their performance, there was no allusion to African American heritage; rather to the sandy environs of Egypt, a clear inspiration for their number. In spite of this deviation from the African American
20th-century music gestures and formlessness of late Romanticism which revived the balanced forms and clearly perceptible thematic processes of earlier styles. There were three distinct "schools" of neoclassicism, associated with Igor Stravinsky, Paul Hindemith, and Arnold Schoenberg. Similar sympathies in the second half of the century are generally subsumed under the heading "postmodernism". A compositional tradition arose in the mid-20th century—particularly in North America—called "experimental music". Its most famous and influential exponent was John Cage (1912–1992). According to Cage, "an experimental action is one the outcome of which is not foreseen", and he was specifically interested in completed works that performed an