When in an emergency situation, tell someone to call 911 by pointing at them and saying "Hey you, in the [descriptive] shirt...call 911].
Shock is a real thing and some people need to be delegated roles explicitly.
"You there, control the traffic around the scene." "Run to the nearest library or mall and get a defibrillator, you will see a sign of a heart with a lightening bolt through it."
Delegate and be descriptive. Get them working for you.