Not a fluke or great shot, but a funny one.
My junior year in highschool, my best friend and i were shooting rats in his grandpaws barn with air rifles.
i had an old solid brass benjamin pump .22 i had polished up to a bright shine, we were talking to the old man and joking around and he was looking at my "golden gun".
I was bragging about getting more rats than my friend, and the old man asked can you hit that bull in the ass (the bull was about 30 yards away) i piped up "Hell, i can hit him in the nuts from here"
he asked would it penetrate them, i answered no, i can give it fewer pumps to drop the velocity, he said with an evil grin.."do it!"
I gave it 6 pumps, took a bead and fired, the bulls head shot up, he bellowed, and started bucking and going crazy, the old man was laughing so hard I thought he was going to have a heart attack..