Complex sentence: The space tug is caught in the mothership's artificial gravitational pull, which also lifts structures from most of Asia, which the debris falls all over Europe when turned off, where the tug manages to escape before heading on to Area 51.
Split into simpler sentences: The space tug is caught in the mothership's artificial gravitational pull, which also lifts structures from most of Asia. When the gravitational pull is turned off, the debris falls over Europe, where the tug manages to escape before heading on to Area 51.