Hug your grandson extra close the next time you get an opportunity and tell him how proud you are of his actions. It speaks highly of his character and thought processes under pressure--there are adults who fall to pieces in similar circumstances!
As for the "adult" in the situation, he needs to get his act together because it's not just his life he's taking into his own hands, it's his loved one's and potentially a stranger and their family on the highways and byways.
