When it was a "litter pick-up day" in my secondary school, so I thought "Hey this would be better than lessons, and I can just dick around with those cool litter picker arm things" I did so, and with said tools, It is possible to throw stones very, very, VERY far. I threw a stone from one end of an olympic sized running track to the other, and then it landed on someone's skull. It wasn't a heavy stone mind you, but it looked so fucking painful, but then I started laughing because it landed on someone who I hated with every part of my immortal soul. And still do.