Oh by "semi voluntary public audience" i mean like, you know. The people in the subway car with you who could move but are kinda watching in mute fascination, or the folk walking through the park who're stopping to peek/outright stare at a distance... That sort of energy. They didn't sign up for this but they're kinda at least a bit complicit in hanging around to watch it continue, regardless of how grossed out they wanna act