It can happen to anyone, and if you don't react quickly you can find your self shooting upward into a very dangerous situation. This subject for some reason is not covered in OW training. I actually believe this would be a good subject to cover. It would not take tong to show a student what to do and practice this in the pool session.
The action of dumping your air bladder and disconnecting lp hose quickly, in the event you experience a stuck inflation valve is a very good response that I believe all should know.