The terrifying incident happened two years ago, when a Bombardier Challenger 604 business jet en route over the Persian gulf, about 630 nautical miles southeast of Muscat, Oman, flew 1,000ft below an Emirates Airbus A380-800 flying from Dubai to Sydney in the opposite direction.
The wake turbulence caused by the superjumbo Airbus - the world's largest passenger jet - was so powerful that about one minute after it passed by, the Challenger, which was flying at 34,000 feet, was sent into an uncontrolled roll that flipped the aircraft between three and five times.
Wake turbulence is formed behind an aircraft as it flies through the air, much like a boat creates a wake in the water. It is exacerbated by a pair of vortices - whirling masses of air - that spin from the wingtips. The vortices are mostly created when a plane is flying slow and the wings are working hardest to produce lift. The bigger the plane, the bigger the wakes. The most virulent wakes leave smaller planes vulnerable if they run into one.