Complex sentence: Upon arriving at his car, a black BMW, he gets in and briefly passes out as his girlfriend, at first shown lying dead on the ground in front of the car, is shown flying back in through the shattered windscreen of the car.
Split into simpler sentences: Upon arriving at his car, a black BMW, he gets in and briefly passes out. His girlfriend, at first shown lying dead on the ground in front of the car, is shown flying back in through the shattered windscreen of the car.