Abstract: At 5:30 a.m. on March 5, 2020, an employee was working for a temporary staffing agency. He had been sent to work at a company that made components for chimneys. He was operating a spot welder. He was placing a stud into a metal insert. As he held the stud with his left hand, he pressed the spot welder's foot pedal. The index finger of his left hand was in the point of operation. It was crushed. The employee was treated without hospitalization. In addition to the investigation for the temporary labor agency, number 128560, there is an investigation for the chimney parts manufacturer, number 128553. They have the same UPA, number 1550939. The account of the investigation of the chimney parts manufacturer provides details not found in the account of the investigation of the staffing agency.