‘I’m a good marksman,’ she added, laughing.
Why was she laughing? What was funny? I got an almost chuckle at the similarity between “marksman” and “Marxist,” and at the idea that she had to say marksMAN, but I doubt those were even potential sources of humor for her. She is not serious, nor is anyone who supports her.
Her lie was funny to her. Thinking to herself, these stupid people will buy my lie of being a great marksman, just like they bought Joe's lie of having a 6 handicap in golf.
She knew she was spouting lies, and it so amused her, she couldn't contain the laugh welling up inside.