Movie theater employee sees a man carry a gun into the theater and calls the cops. When they show up, and can’t find they guy, they stop the show and ask the guy with a gun to stand up. Three stood up
Which references this news article:
Note: these three were legally carrying concealed. The theater has a “no guns” policy, but a sign that was legally too small to be noticed. Nobody got in trouble with the law, because the local law was not crazy enough to assume that gun = criminal.