Gym etiquette. Ever heard of it? This woman clearly hasn't. One person shared a 'Gym Karen' story to Reddit after it unfolded positively, in his favor. He explained how he was down to his last exercise, and was waiting patiently next to a machine that was occupied by a woman who was notorious for being entitled. He had his earphones in, and wasn't directly facing her. She still got annoyed, and confronted him, asking him what he was doing. He replied that he was waiting for the machine, to whic…