This guy failed to follow two of the most important rules of gun safety. 1. The gun is always loaded. 2. Never point the business end of the gun at anything you are not willing to destroy. He was trying to teach gun safety? You can't teach something you don't know or understand yourself.
I actually think he did a great job teaching gun safety. I bet the two he was showing it to will NEVER EVER point a gun at there head and pull the trigger. I bet they'll also always treat it as its loaded also, although this teaching method is rough on the instructor.