I guess I just don't get it. I have no training (plan on getting some ASAP) but have been around guns my entire life. Even after I take a gun apart for cleaning and reassemble it, I ALWAYS check to make sure there isn't a round in there before I test fire for function. I know there isn't a round in there because I just had the thing apart and put it back together, a round didn't magically jump in there while I wasn't looking...but it is just good practice. Unless at a range or in self-defense, never pull the trigger without checking the chamber first.