You see it in the movies all the time. "Snap out of it!" followed by a slap in the face. "Thanks, I needed that" . This is just a bit unrealistic.
There is something known as "taking charge of the situation," which is often unremitting chaos when a first responder arrives on the scene. This is generally accomplished by prioritizing actions, giving calm, confident instructions, setting people to work, and getting on with the business at hand. It is a definite plus if you actually know what to do.
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Geezer in Chief