Passenger captures moment a 'UFO' overtakes his plane during take-off from JFK airport

This is the moment a passenger aboard a Virgin Atlantic flight captured what he claims is a 'UFO' overtaking his flight during take-off from New York JFK airport. The footage which was shot on July 7th, shows a peculiar object flying past the plane at high speed.
The object comes behind from the aeroplane's tail, and moves like a bird but it's not a bird. The passenger and some others think the object may be an extraterrestrial craft aka Alien plane. Some don't believe it. See more photos after the cut and tell us what you think it is..