holy fuck please be kidding. i hunted a lot when i was younger and had to do a gun safety course as a kid, and remember rule number one of gun safety was treat every gun as if it was loaded. this is a rule meant to be applied to jackasses waving around unloaded guns...or so i thought.
That rule only applies to the unprepared. What he's attempting to demonstrate (for slow learners such as yourself) is that you should have your weapon drawn at all times, and wave it around spastically at anyone within 21 feet of you so that they are not easily able to disarm you.
That said, the behind-the-back technique is just asking for a self inflicted GSW to the spleen.