Crosman 760 smoothbore BB gun. Shooting at a bird on a wire that was impossibly far. Dumb, but we were 11 or so, at the time.
Telephone poll was, oh, I dunno - really far. And it was on the top of a big foot hill to boot.
4 of us goofing around. The other 3 kids each take a shot, and the bird doesn't even flinch. Mind you, this is a 10 pump BB gun, so the bird didn't care about us in the least, as we're pumping away. LAst up, and as the undisputed best shot, I took painstaking aim about 6 feet above the bird, thinking I could be the one to get close enough to scare it off. I heard snickers from the other kids, due to my waste of effort, while I took maybe half a minute lining up my shot. Iron sights, mind you. I had to use both eyes and scan up/down to see the bird and the sights. Sights were a full thumb above the dot of a bird. Zero wind that day. Darned if I didn't knock it off the wire with a busted wing. Took about 3 seconds for the BB to get there. The BB struck it right on the joint of the right wing with no penetration into the body; just a fleck of blood on its "elbow" and some missing feathers. If it had hit anywhere else, the bird would probably have just flown off, no worse for the experience.
I feel bad for the bird, but I became a legend that day.