An employee was using a grinder operating at 5,000 rotations per minute (RPM). The grinder also had an offset deck crawler-scarifier attachment with an enclosed vacuum shroud and a built-in handle. The employee stepped on the trailing power cord, began to fall, and lost his grip on the deck crawler-scarifier, which was approximately 15 pounds. The tool's rotating head contacted the adjacent metal rail, causing the deck crawler-scarifier to flip onto its backside exposing the rotating scarifier teeth. When the employee attempted to brace himself using his left hand, his glove contacted the scarifier teeth, causing severe lacerations to his left index and middle fingers and partial degloving of his left ring finger. The severity of the injury resulted in the partial amputation of the left index, middle, and ring fingers.