Thing is, she still should have had enough control to put the gun down first... keeping control is just part of the responsibility that she has when operating a machine that has the potential to cause fatal injuries - whether it be a car, gun or milling machine.
Yes she should have. Agreed. She certainly WAS negligent. If she had injured someone else then she should have been charged accordingly. Luckily her stupidity only caused injury to herself.
My only point is that she should not had her right to own and possess firearms disabled.