What a nightmare !! This makes me very sad and angry. Couldn't the driver in front pull to the left side earlier, not last moment, thus making the kid almost no time to react.... But probably it is the situation when you can not really blame anybody, it is just such unfortunate combination of a lot of bad situations....
I've read one post that the guy in stationary car just spun and happened to stop spinning at that spot, it was the matter of few seconds, not even marshals had time to react.
And it seemed like formula cars are safe nowadays, but they really are not...
So terrible.
Best wishes to Billy, thankfuly we live at a time of big science, medicine achievements. Hopefully receovery will be as good as it can be.