An employee was operating a forklift equipped with a commercial clamp attachment to move unprocessed gaylords of mailbags stored on floors, pallets, or shelves to inspector workstations. The forklift overturned and the employee's right foot became caught between the forklift s roll cage and the concrete floor of the work area, resulting in injuries that required surgical amputation of his big toe and second toe, and a partial amputation of the third toe. The employee was wearing steel boots at the time of the incident.