Drawing on interventionist activity theoretical approaches, this paper describes a method of self-confrontation as a way in which to study objects in technology-mediated practices. In addition to research interests, the aim of examining the objects is to develop the capacity of professionals and organizations to work and learn better in complex technology-mediated work. The method was applied in robotic surgery, in which instruments are tele-operated by a surgeon. The robot offers better, collective visualization of the area under surgical operation than previous techniques. In particular, the paper shows how objects were revealed and new objects emerged during the intervention. We suggest that activity theoretical developmental interventions such as self-confrontations may help understand the complexity and evolution of objects, and thus contribute to studies of technology and organizations.