Wear eye and ear protection as appropriate. A hot piece of metal or powder in your eye is not a good idea. If you want to be able to hear your grandchildren, you should have ear plugs or ear muffs and use them according to the instructions. If they have their finger on the trigger, pulling on the barrel could discharge the gun and injure you. Alcohol or drugs can impair judgment.
Mistakes can happen.
Be vigilant about safety, don't drink alcohol or use some prescription drugs while handling a gun. Don't shoot into the water. Don't shoot at heavy metal objects such as junked cars, old propane tanks and abandoned refrigerators. Ricochets have been deadly in this type of situation. You are sending out an invitation to tragedy if you hide a loaded gun in your home.