Keep your booger hook off the bang switch!

I've seen a lot of people in pictures online lately with their fingers on the triggers of guns. This is the way accidents happen and people get hurt or killed. I know it's probably the fault of TV shows and movies where the actors aren't trained in gun safety so they just run around with fingers on triggers and people get the idea that that is what you're supposed to do! There are notable exceptions, and those make me happy. It's also comfortable for your finger to rest on the trigger when you pick a gun up. They are designed for your finger to go there, but not until you're ready to actually pull the trigger. If you follow these rules, written by the incomparable Jeff Cooper, you are very unlikely to have an accident with a firearm:

RULE I: ALL GUNS ARE ALWAYS LOADED
RULE II: NEVER LET THE MUZZLE COVER ANYTHING YOU ARE NOT WILLING TO DESTROY
Rule III: KEEP YOUR FINGER OFF THE TRIGGER UNTIL YOUR SIGHTS ARE ON THE TARGET
RULE IV: BE SURE OF YOUR TARGET

When someone says "The gun just went off!" someone's finger was on the trigger. The only time guns go off without the trigger being pulled is when they're in bad mechanical shape (oftentimes because someone modified something) or it's a Japanese Nambu type 94.