Delta Air Lines Flight 2311 experienced a scary emergency when the plane descended roughly 27,000 feet in about 10 minutes because of a pressurization issue.
https://www.foxnews.com/travel/jet-plunges-27000-feet-10-minutes-oxygen-masks-suddenly-drop-aboard-flight
https://www.foxnews.com/travel/jet-plunges-27000-feet-10-minutes-oxygen-masks-suddenly-drop-aboard-flight