Somewhere in the cheap seats, a mom with a young kid is hoping to leave as soon as possible, since all of this is very upsetting.
The question: who is regulating the crowd in this situation, and to what degree? Does theater security attempt to hold the audience until law enforcement arrives? If so, do Concerned Young Mom and Terrified Child make it home in time for dinner? From a practical perspective, what's their experience as audience witnesses like? How would it differ if the onstage death were either clearly malicious or clearly accidental?
I wasn't sure what to google for this, but tried 'theater accidents', 'theater deaths', 'leaving the scene of an accident' 'detaining witnesses' and 'witnesses leaving the scene', among others. Couldn't think of a way to narrow it down to groups of witnesses in reasonably enclosed semi-public spaces. Also read Wiki entries for "Witness" and "Crime scene".
Thanks to this awesome comm for existing, and advance thanks to the mods for posting and anyone with thoughts to share on this question. :)