[Yo-Yo]

In 2014, a 9 year old girl firing an Uzi for the first time at an Arizona tourist gun range accidently shot and killed her instructor when she lost control of the weapon.

https://en.wikipedia.org/wiki/Shooting_of_Charles_Vacca

[Calvin Locke]

The one I remembered was a MA father-son at a CT site.

In any case, save for a latching failure, you’d think that they would have partial mags with just enough rounds for learning how to control the recoil.