Interesting!
Obviously, the first thing I'd do is to check if the boy is injured. As I'm in the mercedes, I'll assume that I'm all okay. Next, I'll call 911. Then of course the boy's family should be informed about the accident.
If there are no injuries, I'll call the cops and explain the whole situation to them. They'll take care of the boy.
If it was my mistake that the accident happened, I'll apologize and pray that the cops don't come in the scene
rick