From what you said, the look, "I can do this myself Mom", it sounds like Chris will be fine, thank God. I am so happy for your family after such a terrible scare.
Of course the idiots of the world will try and blame someone else. Many years ago an extremely drunk man, so drunk that he didn't realize he had no wheels left on one side of his car after crashing into a concrete block, he staggered out of his car and just slurred, "Well, guess I'll drive home now." He didn't even have the coordination to open his door. This happened when I was sitting in a car nearby with a group of friends at a burger joint. Our car windows were open and one friend narrowly missed being hit in the head by a flying hubcap from the drunk's car. He tried to tell police that we were the ones who were in his car.
When tragedy happens because of someone's deliberate carelessness, I like my fantasy revenges. I, too, am considered a very kind person, but even kind people have good reason to get angry. The fantasy revenges that only dance in my brain somehow help me to deal and I have been through a lot! There's a great video I saw yesterday that I think you and others here would enjoy, I'll find it for you.
BTW, nice to see the German connections here. My Dad was German.