Rule Two: Never let your muzzle cover anything you're not willing to destroy.
Hmmmm ... Hey, if he's willing to destroy his own head, who am I to argue with him?
Rule Three: Keep your finger off the trigger until your sights are on target ... so ... his head is his target. Fascinating.
Rule Four: Know your target and what is beyond it. Now, we have a problem ... there might be an innocent person to his left next to the firing line ... He's almost certainly violating Rule Four.