For me, this is when the act of watching transforms into the act of witnessing. To witness something implies a responsiveness, the response/ability of the viewer toward the performer. It is radically different from what we might call the 'consuming' gaze that says 'here, you entertain me, I bought a ticket, and I'm going to sit back and watch.' This traditional gaze doesn't want to get involved, doesn't want to give anything back.