He ended the period of creating works exclusively using the body as a medium with the “Zerreissprobe” (Breaking Test) in 1970. His 43rd Aktion was the last and at the same time the most radical of his analyses of self-painting and self-mutilation. In it, Günter Brus actually carried out the injury that had previously often only been intimated by cutting along the back of his head with the razor blade in front of the public. Physical pain was thus not only suggested or acted out by the artist but actually experienced.