The Ilusion of the mass series are inspired in the moving head dogs, those kitch figures for cars that nod their head while the car is moving. 
People can interact with the sculptures touching the head and making him nod, or follow you.
The sculpture represents the average modern subject: the fashion follower, the consumer, the one who follows the main shifts in public opinion.
When you play with the sculpture and make him nod or follow you, for once you can feel like a creator of shifts in public opinion, like a leader and become aware of our situation as a part of the mass.