It's rude to threaten people with a gun.
Hank, who is armed with a pistol, is walking down the street when he sees a stranger, Tom yelling at his girlfriend Janice.
Hank wants to stop Tom from yelling at Janice.
Hank tells Tom that he's making a public scene and that it's rude to yell when you talk.
Hank pulls out his pistol and points it at Tom telling him to back off, or he'll shoot him.
Tom snaps back into reality and realizes he's been getting out of hand and apologizes to Janice.
Tom is terrified and fears for his life and is simultaneously angry at Hank for threatening him.