I don't have a permit to carry, I imagine they answer this in the class.
What would the police do if your concealed weapon came out somehow and someone saw it, and called the police?
I imagine it has happened somewhere.
Since you don't have a permit, they could arrest you for concealed carry without a permit. With a permit, in most states, absolutely nothing would happen if you have the permit.
Brandishing only applies when a firearm is used to intimidate or threaten. A holstered firearm, absent of any other intimidating or threatening action or statement, is not by itself intimidating or threatening.