Abstract: On June 6, 2007, an employee, an experienced mechanic, was attempting to identify the source of a squealing noise coming from the engine of a bus. He removed the fan and belt, and identified the source as coming from one of several pulleys operated by a serpentine belt. He was using a mechanic's stethoscope to identify which pulley was making the noise when his left hand came close to the moving belt. The moving belt dragged his left hand into the operating belt and pulley assembly, severely lacerating his third and fourth fingers of his left hand. The employee was hospitalized and treated for laceration of fingers and hand.