When I was about 14 I was out deer hunting with my dad on some public land. Conditions for deer were fairly poor that day so we figured we'd check our sights in a field for a minute and head back into town. Dad parked the truck and we were getting our rifles loaded and some improvised targets out of the bed of the truck. (coke bottles). Just as I was finishing loading my rifle I heard a shot go off right next to me. and I saw that my dad had accidently discharged his 30-30 into the dirt about 4 inches in front of his boot.
Another is while trekking in to our ground blinds my dad had a tendency to trip over deadfall with a 12ga slug gun in hand. Usually carried 1 in the tube with the saftey on. Even with the saftey it made me nervous that someone may catch a stray slug.