Wow that not the first time I seen a Mopar come apart like that in a crash.
Years ago not far from my house a bunch of kids were killed when they hit a pole. The main body of the car was still at the pole and the front end was about 200 yards down the street and the engine and trans was in the yard across the street from were they hit the pole.
It was a chevy thing. The car body they crashed into the bulldozer was a Camero.
BUT, those old unibody mopars were pretty weak. I remember a certain stickshift GTX that had a one onch gap open up above the passenger side window in first and second. As cool as they were, they were really junky bodys.