[Paved Paradise]

No. Read up on it. They actually have a name for this, something like, “Talk and Die.” There is an injury and depending on level, blood is seeping into cavity that houses brain - blood puts pressure on the brain; hence, the reason she got the terrible headache one hour later. If the bleed is very intense, it takes very little time for the brain to be squeezed to death basically and deprived of oxygen, which is what supposedly happened here.

[Steve_Seattle]

This sounds like pretty much the same thing that killed race driver Mark Donahue back in the 70’s. He crashed and banged his head, but walked away. Hours later, he developed a headache, was taken to the hospital, and died the next day.

[Yorlik803]

I was a EMT for 19 years, and I have seen this happen. A simple fall, person talking and vitals were good pupils were equal and responsive, no other deficit's. While transporting to the hospital, every goes to crap and we pull up the the ER doing chest compressions and bagging the person.
The human body is a strange thing. What kills one person leave the next with a bad headache.
I hope the family finds peace and comfort.