Andrus Kallastuís (1967) Tantsutroop (Dance Tropus, 2011) is an extension of his previously completed work Welt gebaut istís (2007) secco-fragment. Dance Tropus bases on the idea of divine dance. For the creation of the choreography the human body is divided into fourteen different parts that express various choreographic abilities. Every part has three to fifteen choreographic functions. The Dance part consist of the so-called choreographic chords that are unique combinations of movements and poses, they are acquiesced using serial and stochastic methods. The vocal part of the Dance Tropus contains only strong plosives and click-sounds that correspond to Welt gebaut istís secco-fragment. The flute part include multifonics and key clicks, the cello part has the non-traditional play on instrument corpus and the piano part contains playing on blocked keys and prepared strings. The form of the Dance Tropus is based on Rait Rosinís video about a fanatic fisherman who with the risk losing his life enjoys the yearís last winter experiences on the almost melted ice of the Pšrnu River.