AMERICA — Southwest Airlines Flight 1380 suffered a massive engine failure on Tuesday, which forced the pilot to make an emergency landing. <br />When the left engine blew apart, it sent shrapnel through the plane, killing one passenger, and leaving a hole in the aircraft, according to CNN. <br /><br />The hole caused the cabin to depressurize, and the oxygen masks to drop down. <br /><br />One photo from passenger Marty Martinez shows several passengers wearing oxygen masks incorrectly. <br /><br />To properly use the mask, pull down on the mask until the plastic tubing is fully extended. Put the mask over you mouth and nose and breathe regularly. <br />At altitudes over 15,000 feet, people struggle to breathe and keep their blood oxygenated. They can develop a condition called hypoxia and lose consciousness within minutes, according to Business Insider. <br /><br />According to the Aircraft Owners and Pilots Association, symptoms of hypoxia include, "nausea, apprehension, tunnel vision, headaches, fatigue, dizziness, blurred vision, tingling sensations, numbness and mental confusion."<br /><br />Flight 1380 engine failure occurred at 31,000 feet, according to passenger reports.<br /><br />The National Transportation Safety Board is currently investigating the incident.