Never let the muzzle cover anything you're not willing to destroy.
A 16 year old in Michigan learned this lesson for himself a couple of days ago. His 21 year old brother is dead.
"Blackman-Leoni Department of Public Safety Deputy Director Jon Johnston tells the Jackson Citizen Patriot in an email that the younger brother went into his brother's room Saturday night and reportedly asked "Do you feel lucky?" before pulling the trigger."