The simple laws of mechanics, motion and kinetic energy. For the car to have impacted a stationary object and then have an assembly as massive as the drivetrain to reverse direction and end up 150-200ft behind the car is impossible.
The entire drivetrain would have had to reverse direction through the firewall and passenger compartment and then have the energy to travel the 150-200 ft against the direction of travel. Still photos do indicate the type of front end collision necessary to even approach that type of event and generate that level of kinetic energy simply did not occur.
Well, here’s a little different take on such a happening:
It's entirely possible.
Are you familiar with the concept of a vector?
The entire drivetrain would have had to reverse direction through the firewall and passenger compartment
That's a statement which, again, makes a ton of assumptions about the angle of impact and the trajectory of these components - assumptions which are not provable from the data available.
Still photos do indicate the type of front end collision necessary to even approach that type of event and generate that level of kinetic energy simply did not occur.
They indicate no such thing.
A 3000cc engine weighs a couple of hundred pounds. What happens if you bounce a couple of hundred pounds against a fairly rigid object at 80mph? How far could it go?
The engine did not land behind the car.