Exit 8

While in the subway, The Lost Man receives a call from his ex-girlfriend informing him that she is pregnant with his child and asking him what to do. Unsure on whether he's fit to be a father after having failed to defend a woman being berated by another passenger for her crying baby, he is overcome with an asthma attack. He soon finds himself in a deserted, endlessly looping corridor. Through trial and error and a set of instructions on a wall, The Lost Man realizes he needs to reach Exit 8 by turning back whenever the corridor has an anomaly and moving forward when there is none. Anomalies can range from a door having a doorknob where previously there was none, to blood raining from the ceiling. Any mistake returns him to Exit 0, resetting his progress.