Abstract: At approximately 9:35 a.m. on July 20, 2004, Employee #1, a mechanic with a Pep Boys store in Huntington Park, CA, was inflating an automobile tire mounted on a single-piece steel rim. The customer had stated that he had brought it in because he was unsuccessful inflating it himself. Employee #1 placed the tire on the ground near the opening of a service bay and began to inflate the tire using a compressed air hose and nozzle through the tire's valve stem. As he was inflating the tire, the bottom side burst causing it to fly upwards against his right arm. Employee #1 was hospitalized for a fracture. The investigation determined that the accident was caused by Employee #1's failure to use a safety tire rack, cage or other equivalent restraining device to contain the tire and/or rim in the event of an explosion.