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Footage has emerged from a horrified passenger, known as only Mr Chang, who was on board the flight travelling through a thunderstorm, on its way from Atlanta to Las Vegas, in the US.
According to reports, the commuter spotted the anomaly after waking up due to the weather conditions.
The video appears to show an orange light glowing in the middle of the thunderstorm.
It then cuts off before we can get a better view, apparently after Mr Chang's phone died.