There have been several negligent discharge incidents recently. Two guys, one in Arizona and one in Omaha, shot off parts of what I've heard called "wedding tackle". Another guy let off a round when he caught the trigger as he put his pistol back into a worn out holster. Now, in Omaha, a guy shot himself when his gun fell out of his pocket.
The primary cause of all of these incidents was poor gun handling. But I think it is worth noting that none of them would have occurred if the gun involved had been a traditional Browning Colt automatic. If you have the hammer down, it's not going to fire unless you drop it four stories and it lands wrong. If you have if cocked and locked, it's not going to fire even if you pull the trigger. If you have it cocked and unlocked, the grip safety will probably save you. John Browning came up with the optimum balance between readiness, shootability and safety over a hundred years ago.