“There is a certain kind of ghost that can only materialize with the aid of a sheet or other piece of cloth to give it outline,” says William S. Burroughs in his 1953 novel, Junky. So too can the ephemeral, performing human body be traced by the materials associated with it. In performance or workshop settings, New York–based performance artist Michael Portnoy frequently probes the relationship between individuals and the things around them by using language and objects to provoke movement—both his own and that of his audience. This procedure is depicted in his HD-video film THRILLOCHROMES