Passengers were plunged into panic after a “rapid decompression” caused oxygen masks to drop from the ceiling in a horrifying mid-air incident. The United Airlines aircraft, cruising at approximately 40,000 feet over Ohio, was forced into a swift 10,000-foot descent.

Terrified fliers on social media praised the exceptional poise of the cabin crew amidst the mayhem. At 7.45am local time, distress signals flickered in the plane’s cockpit, prompting an urgent call to air traffic control and…