The captain later ordered his crew to turn off the ventilation system when he realized it was feeding the fire, and an unintended result was that smoke was able to enter passenger cabins via the door vents. Some tried to seek refuge from the smoke in areas such as closets and bathrooms or remain asleep in bed, but were eventually overcome by smoke. Those who tried to escape may have variously encountered thick smoke, confusing corridor layouts, and poorly trained crew members.