Abstract: On April 27, 2008, Employee #1 was reroofing a large commercial and manufacturing building about 30 ft high. The roof, about 60,000 square ft, is flat and has 30 skylights about 4 ft by 8 ft spaced at regular intervals across its surface. The skylights were unguarded by handrails or screens. Employer #1 instructed employees to begin setting up, including hoisting screen guards for the skylights to the roof. Employee #1, who had worked for the employer for about one month, began tearing off the roof. While pulling on roofing materials, he lost his balance, stumbled backwards, and fell through a skylight behind him. He fell 30 ft and struck the concrete floor inside the building. Coworkers called emergency medical services came to Employee #1's aid. Emergency response personnel arrived and took Employee #1 to the nearest medical center, where he was hospitalized for 15 days for major multiple trauma, including a head injury.