Mishnah Baba Kama 3:7

Let's say somebody is chopping wood on his own private property, and as he's chopping, wood flies into the air and damages somebody or something in a public area. If he's chopping wood in a public space and causes damage to something on private property, or if he's chopping wood on his own private property and causes wood to fly and damage something on another person's private property—let's say the homes were adjacent to each other—in all of these cases, he is obligated to pay for the damages. He is hitting the wood; he's causing it to fly up into the air and then land on something, and therefore he is the one who is responsible. We say the force that he puts into something is like his own body. He is causing damage in an area where it is unexpected. Somebody's walking on their own property; they're not expecting a piece of wood to fly in from another area and hurt them. So therefore, this person was chopping wood, and he's responsible. He should have done it in a way that was not going to cause wood to fly into another area. He is obligated to pay for the damage.