You are the first responder. Even if you never touch a patient.

At a mass gathering the first person to notice trouble is almost never a clinician — it is a steward, a security officer, a venue manager. This track is for them. It teaches what a crowd does to a human body, how to recognize the emergencies that kill fastest, how to summon help so help can find you, and why keeping an access lane clear is a medical act. It teaches recognition and role — not treatment. Every item is cited to the evidence library, so you can read the source and argue with it.