People seem to focus on the improper clearing technique and ignore the basic screwup of taking the gun out in the first place; hence my emphasis on don't show and tell.
Too many folks think it is cool to show off their carry guns by taking them out, waving them around and jacking with the magazines and slides, and they think it is fine since they are Jedi Master gun handlers. Proper clearing techniques are important, but those techniques are not a factor for a gun that doesn't leave the holster and shouldn't leave the holster.
Leave the carry gun in its holster unless you are attacked by someone bent on inflicting serious bodily injury!
Seriously, you beat the "don't show and tell" so much that you completely ignored my question on proper clearing of firearms aside from giving me the four basic rules.