They should probably get special training at the VA too.

Good point. Some of the hunters, at least, aren't too distantly removed from soldiers in combat zones. I vote for supernatural therapist as Sam's second career if he ever leaves the hunting gig again.

with that amount he totally would have needed a coroner (if it were ordinary people) but at least a transfusion

No kidding. Sam made an awfully quick recovery. He should have still been nearly face-planting if he stood up too fast.