Slingshots can be pretty useful. I use a wrist brace style slingshot with a fishing reel attached to run lines up into trees. Sounds strange? Well, it's how we string wire antenna's at a good height for amateur radio. You fire a lead fishing weight, with the fishing line attached to the reel. I wish I came up with the idea, but, it's someone else's concept. Works great though, the mono line can be fired, pretty accurately, a long way, and then used to pull heavier line up and over a limb on a tree. Same concept as throwing a monkey's fist with a light line attached from one ship to another, and then pulling a heavier line across.