The paper investigates how an audience can be challenged to 'perform as interface' pointing towards the activation of a certain attitude; an active mind-set which constantly leads the attention back to the experience of our body; to perceive, critically read and make sense of this experience in relation to the interaction with(in) the technologically mediated world [16]. As a case, the paper focuses on the interactive installation "CHAIR-JUMP-CHUTE" and on the various ways the audience was induced to interact with it. The paper identifies triggers stimulating the participant to become fully - as in physically and mentally - engaged in the interaction with a technological installation in the semi-public setting of a cultural institute. Furth...