Another really unhelpful thing to say in these situations is the variant "Calm down".
What about the a guy gets a call from his home monitoring system and starts yelling that his house has burned to the ground?
What about a guy who shouts "you aren't my manager and you never will be" to a coworker?
I made none of those up. They all happened, from 3 different people. (At the same company, for that matter.) Some people really do overreact and really do need to calm down.
The failure for those people to be removed led everyone else to leave.