Close-up footage shows an emergency door flying through the air from Air India that allowed one passenger to escape and live.

In a YouTube video, Captain Steve, who has flown both the Boeing 777 and the Boeing 787, said, "Three main theories revolve around the loss of lift of this aeroplane."

As Air India Flight AI171 fell from the sky early Thursday, Vishwaskumar Ramesh, a passenger tucked in the first row of economy class, was preparing to meet his maker. “Everything happened in front of my eyes,