What dreadful luck if it turns out that the crew survived a low altitude night autorotation only to perish as the roof caved in shortly afterwards.
I recall that there used to be Lynx at Portland that was used for training after a crash with loss of the crew. Most of the airframe was immaculate, and it was hard to believe that it had been written off in a high energy impact. The problem was the nose - a few thin struts and some plexiglass do not offer a lot of "crumple zone", and it was significant intrusion of the nose/instrument panel that made the crash unsurvivable.
I wonder just how much protection the front of an EC135 would offer as is toppled forwards through a roof, especially if the crew were unstrapped and ready for a hasty exit?