Phantom Freddy is a hallucination that will occasionally walk past your office window from right to left. His 'build' is designed to distract and cause system errors. His weakness is your ability to quickly look away. If you see him approaching in your peripheral vision, immediately move your mouse to the opposite side of the screen to avoid looking directly at him. If you fail to do so, he will jump scare you, causing a ventilation error. This error is particularly dangerous as it can lead to blackouts and make you vulnerable to Springtrap. Always be ready to avert your gaze when he appears.
