"A popular game he often played was called “duck on a rock.” He and his friends would gather near a large stone at the blacksmith’s yard near the one-room schoolhouse they attended. A rock — called “the duck” — was placed on the stone while one person acted as a guard. The others stood 10–15 feet away, trying to displace it from its perch by hurling rocks of their own. It wasn’t long before the kids realized that trying to throw the rock directly past the guard like a baseball wasn’t effective. Instead, they began lobbing it high in the air, arcing over the guard. The rules of the game — and the development of the lob shot — stuck with Naismith and later became the basis of basketball."
"A popular game he often played was called “duck on a rock.” He and his friends would gather near a large stone at the blacksmith’s yard near the one-room schoolhouse they attended. A rock — called “the duck” — was placed on the stone while one person acted as a guard. The others stood 10–15 feet away, trying to displace it from its perch by hurling rocks of their own. It wasn’t long before the kids realized that trying to throw the rock directly past the guard like a baseball wasn’t effective. Instead, they began lobbing it high in the air, arcing over the guard. The rules of the game — and the development of the lob shot — stuck with Naismith and later became the basis of basketball."
Back when kids threw rocks at each other for the fun of it and nobody cared.