Traditional bonesetters rely on the touch of their hands. Most of the time they can tell within seconds whether a bone is fractured or broken. The most difficult bone to figure out by touch alone is the femur, the strongest bone in the body, deeply set in the thigh. A rubber bullet in the front of the thigh is more likely to break the bone than one from behind. A gas canister with a downward trajectory—shot from a rooftop, say, or a helicopter—will probably fracture the bone, though one shot from a low angle close to the ground might break it in two.
