My family very narrowly avoided having this happen with my dad. Being on blood thinners typically play a part in this so basically if you're ever in any sort of accident or fall or whatever and you have a headache, especially if you're on blood thinners it's worth getting it checked out. It's scary stuff
This is incredibly frightening to me. Such a random incident and boom you're dead. This is the kind of thing that keeps someone up at night.