In a commercial flight from dubai to karachi (pakistan) during the approach in a clear night at about 15.000 feet i saw a bright light about the same size and colour of planet venus shoot up from the ocean in a parabolic trajectory, changing direction very abruptly and coming back down into the water. it went up about 50.000 feet in the horizon in front of us and came back into the water. the whole event lasted about 1 second only, which to me made it quite clear that it was something unidentified that defy, the laws of physics with such a huge speed and directional change in such a short period of time. i have no explanation for that other than something from out of this planet.