Abstract: Employee #1 and coworkers were cleaning up a work area. Employee #1 was trying to determine the amount of isopropanol in a 55 gallon drum and opened the container to look inside. As he was tilting it back and forth, his cigarette lighter fell from his pocket into the drum. Employee #1 stood the drum upright and was bending down to retrieve his lighter when the drum exploded. Employee #1 suffered second-degree burns over approximately 70 percent of his body. The container of isopropanol, a class 1A flammable, was not grounded; the lack of grounding may have caused the vapor to ignite and explode.