"For many years, all before 9-11, I would take folding ceramic knives that I purchased in Japan in my pockets. I’d make sure there was nothing metal on me and I’d walk through the metal detector. On the planes I’d often rub the knife and tell the stewardess that I hoped the meat was tender. When served, I’d pull out my ceramic knife and cut the steak with it. Other passengers seemed agitated but the most a stewardess ever said was ‘oh, a plastic knife.’ The blade was 6 inches long. I told friends that it was legal because of the 3-finger rule, that if a flight attendant would likely break the knife before losing 3 fingers then it was legal."
— Woz
