It is hard to overstate how revolutionary that rope and Andon board were for the auto industry: Allowing a mere blue-collar worker to stop the line would have been heresy in Detroit a few decades ago, as managers were more concerned about keeping up volume than quality.
The only way to stop a life-threatening reaction, called anaphylaxis, is an epinephrine auto-injector, which allergists recommend that everyone with severe food allergies should carry.