MEXICO - When you get on a plane, you expect to relax and have a nice flight.

But that was not the case for passengers on a flight to Mexico-- it was more like something out of a movie.

A video recorded by a passenger shows a green viper slithering above seats before suddenly dropping down and dangling overhead while the plane was still in flight.

Officials of Aeromexico said the flight made an emergency landing and the reptile was removed by animal control.

The airline is investigating how the snake got on the plane.