(1977)
A black, elongated vertical box without a bottom is affixed to the wall. A round opening has been made in the upper half of the box's facing side. The lower half of the facing side contains a label with the following text: "Finger, or the Designation of Oneself as an Object External in Relation to Oneself."
Those who wish to participate in the action "Finger" pass their hand into the box from below and point their index finger at themselves through the opening in the upper half of the box's facing side.