The Prehysterical Machine has a spherical body and eight arms made of aluminum tubing. It has a sensing system, a motor system and a control system that functions as an autonomous nervous system (entirely reactive). The machine is suspended from the ceiling and its arms are actuated by pneumatic valves and cylinders. Pyroelectric sensors allow the robot to detect the presence of viewers in the nearby environment. It reacts to the viewers according to the amount of stimuli it receives. The perceived emergent behaviors of this machine engender a multiplicity of interpretations based on single dynamic pattern of events.The aim of this project is to induce empathy of the viewer towards a “character” which is nothing more than an articulated metal structure. The strength of the simulacra is emphasized by perverting the perception of the creature, which is neither animal nor human, carried through the inevitable instinct of anthropomorphism and projection of our internal sensations, a reflex triggered by any phenomenon that challenges our senses.