Our 8 hr course wound up going 10hrs, but our CCH instructor never covered a situation like that. He covered many scenarios, but nothing like that. However he did say " you are not the police". One scenario I remember was: A guy with a finger gun, inside his coat pocket, turning & acting aggressively toward you. He said you have the right to "stop the threat". The fact that he's using a finger gun is" his problem", because in your eyes he could possibly have an actual handgun in his jacket. His words were "too bad, too sad"!