It is always nice to see there are helpful people on the roads.
You get off a bus or a train but you get out of a car.
I would say "Just as he was getting back into the car...."
Safe travelling, Suade.
I don't remember any such incidents happened to me recently but I have noticed people offering their help to others if they found them in any such situation like the one you experienced.
One thing I found interesting in the conversation you have mentioned i.e., the response to "Do you need any help?". I might get confused:) Thanks for making it clear.
Helpful people are everywhere:)