Umberto Boccioni, Unique Forms of Continuity in Space. Private Collection.
“In Unique Forms of Continuity in Space, the figure is aerodynamically deformed by speed. Boccioni exaggerated the body’s dynamism so that it embodied the urge towards progress. The sculpture may reflect ideas of the mechanised body that appeared in Futurist writings, as well as the ‘superman’ envisaged by the philosopher Friedrich Nietzsche. Considered the most successful of Boccioni’s sculptural experiments, this bronze casting was done posthumously in 1949, from the artist’s original plaster (which was never cast during his lifetime).”
Source: Art in the Picture – http://www.artinthepicture.com/paintings/Umberto_Boccioni/Unique-Forms-of-Continuity-in-Space/