The 3.5 Rules of Gun Safety:

Deputies: Man shoots stranger in leg while trying to sell gun | HeraldTribune.com:

 Masotti took the gun out of a lock-box and “racked the slide,” which involves manually moving the gun's slide so a gun can load the first round of ammunition from a magazine into its chamber. As he tried to adjust the gun, it fired a round into the stranger's right thigh. Masotti tried to give the handgun to a friend, who arrived just after the shooting, to hide, but Masotti's friend refused to hide the gun and instead stayed in the parking lot with the victim. 

Things to remember:

1. ALWAYS keep the gun pointed in a safe direction;
2. ALWAYS keep your finger off the trigger until you're ready to shoot;
3. ALWAYS keep the gun unloaded until ready to shoot.
4. The Florida Rule: "Hey, Y'all!  Watch THIS!"