Abstract: On August 21, 2007, Employee #1, a construction laborer, was working at a demolition site. He picked up a Bosch hammer drill with his right hand and pressed the trigger switch. There was no bit in the insert shank end. While the hammer drill was on, he inserted the third finger of his left hand into the rotating end, nearly amputating his finger. Employee #1 was transported to Highland Hospital in Oakland, CA, and later that day was transported to the California Pacific Medical Center in San Francisco. Upon investigation, it was reported that Employee #1 had used the hammer drill prior to the day that he was injured. He stated that his employer had told him before the day of the accident to read the owner's manual but that he had not finished. The manual specified that the drill was to be turned on and operated using two hands.