You're struggling to loosen over-tightened lug nuts while fixing a flat tire on a hot, dusty highway. At this moment, you would give anything to hear the high-pitched zing of an air wrench doing the job in seconds at the local tire shop. But like practically anything else, compressed air can be misused, with painful and sometimes fatal results. Take the case of a supply boat crewman who was fatally struck on the head by a flexible hose that shot onto the boat deck, propelled by a sudden release of compressed air. The accident happened following the transfer of bulk drilling chemicals. […]