Over-exertion (Not Elsewhere Classified)
Employee was welding, laying down on his chest with out-stretched arms, (out in front) to weld his work. While welding he felt what he thought was stray voltage from the welder in his upper left side. He stopped welding and tried to move, as the pain increased he realized it was not the welder, the pain was in his ribs and growing rapidly. He had muscle strain in that area.