The last Air Berlin transatlantic flight that flew from Miami, Florida, to Düsseldorf in Germany on Monday, took two turns to land on the runway at the Düsseldorf airport — an unexplained move that was captured by many who were standing by the glass windows of the airport, according to a Business Insider report.

The footage shows an Airbus A330 descending toward the runway, as if it was going to land. However, many witnesses noticed the altitude of the flight was not right for making a smooth landing. “It’s too high, it’s too high,” one person can be heard gasping in the video.

Moments after the observation is heard, the flight swoops over the runway before making a tight left curve around the terminal and heading back up into the sky.

It returned on the runway after making low pass around the control tower, an unusal move for a pilot unless there is no immediate crisis either at the airport or something is wrong with the mechanics of the flight.

The flight was carrying 200 passengers at the time, and nobody lodged an official complaint with the company for the particular stint pulled by the pilot.

But the German air safety officials have asked the identified pilot to explain why the first landing was aborted. Stefan Commessmann, a Federal Aviation Office spokesman said the action pulled by the pilot of Air Berlin pilot's "differs from the usual maneuver and the reason for it needs to be clarified," Business Insider reported.

The company stated the particular maneuver taken by the pilot was cleared by the flight control center. The control center gave permission for making a left turn in the case of the pilot decides to abort the landing. Nevertheless, the reason the pilot needed to abort the first landing is not clear.

According to the Local, the Air Berlin is fully cooperating with the investigation launched into the incident by the federal aviation authority. “Air Berlin fully supports the LBA in its work,” the company said.

Some media outlets speculated that aborting the first landing might have been the pilot’s way of saying “goobye” to his passengers as Air Berlin filed for bankruptcy in August last year, and the airlines would cease to operate by the end of October. However, these reports have not been confirmed by the LBA, Mail Online repeorted.