A commercial flight heading from from Cebu, in the Philippines, to Busan, South Korea, was forced to turn back 40 minutes into the flight when the crew realized one of the plane doors was ajar. The Jin Air flight was carrying 163 passengers and had reached an altitude of 10,000 feet when flight staff heard a noise (perhaps the sound of breathable oxygen being sucked into the atmosphere?) and realized that the front left door was not fully shut. Fortunately, the pilot was able to turn the plane around and land it safely in Cebu without any injuries, although a few passengers reported feeling nauseous during the trip back to the Philippines.