The Alfa Balloon is a giant balloon, two meters in diameter, attached to a system of monitors and sensors. It follows visitors in the space by means of a concealed robot, while disrupting their movement and blocking their field of vision. The movement of the ball is accompanied by a warning sound which grows in volume the closer it comes to the visitor, and intensifies the feeling of discomfort. The work deals with tactics of control, surveillance and supervision through technology. It draws its inspiration from the television series “The Prisoner,” which was broadcast in the 1960’s, and among other things is remembered today because of the disturbing image of a man running along the sea shore chased by a giant white ball. Such a threat is ridiculed in light of the fact that the giant ball is full of air, creating an ironic gap between the image created by the inflated object and its content.