I’ve needed something like this twice in the last 2 years, but was not alone.
On one occasion whilst the ambulance took me to hospital, a friend drove my car an hour home, and my wife collected me later.
Then a month ago, things had changed slightly and I was closer to home and my new partner was dropped off by her son and drove me and my car to A&E where the pelvis I’d ridden out of the woods on was found to be broken in 2 places.
So the car getting home wasn’t an issue.
So it’s not quite your scenario, but I was thinking earlier today what would have happened if I hadn’t have been with mates… Could well have died in the first case (possibly fitted and might have had respiratory obstruction) and would have had a bloody hard time getting out of the woods the second time. Time to reevaluate my skills and choices.