Even people who train are idiots sometimes. Mostly the kids who have been around only a few months. Most are cool with shutting up and learning, but some others
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I remember my Sensei and one of our seniors attending a western sword class in a few years back, and there was this kid 18 years old or so who kept bragging that if you swung at his head with a bokken, he would catch it. The instructor said, yeah ok, whatever, good for you, and went back to teaching. This kid was so annoying and pestering that the instructor finally said ok lets try. No need to explain more, the kid ends up on the ground with a goose egg on his head, and never comes back.
I remember my Sensei and one of our seniors attending a western sword class in a few years back, and there was this kid 18 years old or so who kept bragging that if you swung at his head with a bokken, he would catch it. The instructor said, yeah ok, whatever, good for you, and went back to teaching. This kid was so annoying and pestering that the instructor finally said ok lets try. No need to explain more, the kid ends up on the ground with a goose egg on his head, and never comes back.