He starts in the closet, and then moves on to the hallway, walking straight through to another hallway before finally reaching the office. In order to prevent him from attacking you, you must hide under the desk, which has a success rate of 55%. If that fails, you can alternatively turn off the power, which has a 45% success rate. Failing to do either of these actions will result in him getting closer to you and ultimately, attacking you, leading to a game over.