When the Ambulance event starts, assign a runner immediately, keep the desk covered, and treat the emergency patient before the event turns into a hospital-wide backlog. Ambulance pressure is a coordination test. The siren pulls players away from the front, but leaving the Shutter unmanaged can admit a new problem while the team is busy.
When the Ambulance event starts, I treat it like a role check. One player answers the ambulance, one player confirms the desk is covered, and the lobby keeps the front from turning into a second emergency.
In actual runs, I keep the order short enough to remember while alarms and room prompts are going off: Call ambulance. Assign one runner. Keep the desk covered. Treat or route the emergency patient. Return to queue control. That order keeps the desk from drifting open while someone is still fixing a room or recovering Sanity. It also gives public lobbies a simple rhythm: one player says the job, one player handles it, and nobody adds a fresh patient until the current problem is under control.
The siren makes everyone want to run outside. That is exactly why teams lose control of the Shutter. If you are solo, secure the front first, then handle the ambulance patient.
The habits that save the run are small but noticeable. Solo players should secure the front before running out. Co-op teams should confirm who stayed at desk. Stop new admits until someone owns the current decision. Animal Hospital becomes harder when the desk opens a patient while another threat is still unresolved. Most failures come from stacking problems: a rushed Shutter open, an unfinished treatment room, and a Sanity drop happening at the same time. When another player already has the problem covered, the best help is often boring: hold the Shutter, watch the next patient, or finish the room that got interrupted. Crowding the same spot usually hides the next mistake instead of fixing the current one.
For quick lobby decisions, the answers stay simple. Should everyone respond at once? No. Send one responder when possible and keep the Shutter covered. What should solo players do first? Secure the Shutter, solve the active problem, then return to treatment or recovery. If the lobby feels messy, name the active problem out loud: unchecked patient, unfinished treatment, low Sanity, enemy, fire, ambulance, or ritual. Once the group knows which one is active, the next move is much easier to choose.
After the danger clears, I like taking one short reset before speeding up again. Check Sanity, check the room that got interrupted, and check whether the next animal outside has been fully screened. That tiny pause feels slow, but it stops one mistake from turning into three.