I believe this happened once before when somebody let a young child fire an UZI. It climbed up and shot either the kid or the instructor in the head.
Yes, it happened in Massachusetts.
“The teenager who worked at a gun show where 8-year-old Christopher Bizilj accidentally killed himself while shooting an Uzi testified today he twice suggested the boy’s father pick a less powerful weapon for the boy to shoot....”
http://abcnews.go.com/US/father-christopher-bizilj-died-firing-uzi-urged-son/story?id=12565132
It was in Vegas too. Little boy. Glock 18. Dead right there. I was hoping the entire shooting world would have learned the hard lesson about automatic weapons in the hands of children. Apparently not.
Massachusetts (2008)
I know some Freeper will turn that into a shorter link for us. Thank you.