He Could Always Work For The RCMP

NEW BEDFORD, Mass. (AP) — A firearms instructor in southern Massachusetts has been assigned to other duties after his gun accidentally went off while he was teaching a class on weapons safety.
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The bullet ripped a hole in Lamar’s pants but missed his leg and foot.
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Sheriff Thomas Hodgson says the officer made a “gross error in judgment” by not emptying the weapon before the class last week.

Maybe the guy was demonstrating a "don't do".