A bush bob is simply a line and hook dangling into a river, stream or lake that has the other end attached to an overhead limb. They can be baited with almost any live bait, traditional bait, or even a small piece of cut up soap. I used to set them on the Potomac River and come back in a few hours usually to see most of the tree limbs moving. The natural elasticity of the limbs hook the fish for you. It beats sitting on the river bank all day.