We don't usually think of minor shocks caused by static electricity as particularly dangerous events, but in a production environment even a minor shock can cause serious damage. A worker who quickly pulls or jumps in response to a shock could endanger himself or other workers using hazardous equipment.
Explosion Risk. When working with volatile chemicals and explosives, even a small electrostatic event can trigger an explosive reaction with devastating consequences. In rare cases, static electricity can build up enough to cause a real spark during discharge.