This antique pocketknife came with instructions for playing a game of baseball. Sorta.

The Baseball Knife from Hammer Brand USA was intended for a modified version of the knife-throwing game mumbly peg. When it was your turn, you'd drop the knife on the ground with the blades open, and depending on how it landed, you'd either get a strike, single, double, triple play, homer, or an out. Then it was the other guy's turn. You could play a whole nine innings if the knife didn't break first.