When I was a kid (15 or 16, probably) I was "sight hunting" (squirrels, rabbits, turkeys, pretty much whatever gets in your sights and would be edible - we didn't pay much attention to seasons back then) along a ridgeline near my hometown in West Virginia. I was sitting on a stump looking around, when I saw some movement back along the trail behind me, in the direction I'd come from.
Only took me a second to realize that I was seeing two bear cubs a little over 100 yards away, with their noses to the ground, ambling along in my direction. To this day, I'm not certain if they were following me, but I had a peanut butter sandwich in my pocket, and I thought they had probably smelled it and were tracking me. A few moments later, I heard what sounded like a WWF wrestling match starting up in the laurel thicket below me, and when I looked down that way I saw Momma Bear standing up on her hind legs to yank a grape vine down out of a tree. To a 16 year old boy alone in the woods, that black bear looked like the biggest, meanest, man-eating grizzly this side of the Yukon.
Didn't take me long to rid myself of that peanut butter sandwich, then I emptied my gun (a 16-gauge .870) of bird shot and filled it with slugs, then I got the hell out of Dodge. After I'd crossed a few points I figured I was out of the bear's area, so I took the slugs back out and replaced them with the bird shot. Unfortunately, I must have miscounted somewhere - because without knowing it, I left a slug in the barrel.
Later that afternoon I heard a pheasant drumming, so I snuck up on him using the trick my Grandpa taught me - you only move when he's drumming, then you freeze until he starts again. Turns out he was a nice fat one, sitting up on the end of a log whaling away with those wings trying to drum up a mate. I got good and close, laid the bead on him and opened up. As soon as I pulled the trigger I realized my mistake.
Drilled that pheasant center-mass with a 16-gauge slug from about 15 yards away. Wasn't anything left but blood and feathers.