 Moreover Boal’s “invisible theatre” also suggests two further things: one an observation; the other a question. The observation is that the pull of Boal’s case is felt because the interaction between spectators and performers can be explained as consisting only of the ordinary uses of one’s sensory apparatus. Second, Boal’s “invisible theatre” prompts the non-skeptical question, namely, how do spectators grasp and understand the content of theatrical performances in either of the two classes?