More likely she braced her fall with her skull, but her neck muscles were inadequate to the task of keeping her alive. I think Russians need to start putting in cybernetic shock absorbers.
I just wanted to give an example of an injury incompatible with life. /u/emzili@programming.dev thankfully linked the Wikipedia article onto the definition of the fixed term. From the linked Wikipedia article total body disruption might be a possible trauma caused by
a fall at terminal velocity onto a solid surface or water [.]
The injury you suggested probably doesn’t count yet, as it’s not ‘evident’ enough to be incompatible with life.