Abilene, Kansas, City Ordinance 349 declares: "Any person who shall in the city of Abilene shoot at a horse with any concealed or unconcealed bean snapper or like article, shall upon conviction, be fined."
I particularly love this one because it's so easy to visualize how it came up.
Watch those concealed bean snappers, people. I wonder if you could get a carry permit for those? Where's the NRA on bean snappers? How about Chipmunk based pea shooters?
Interestingly enough there's also a law in Kansas against shooting rabbits from motorboats. Presumably this became a problem when rabbits took up water skiing. Silly wabbit. Twicks are for skiers.