When I was young, we lived by a large field filled with Blackberry bushes. Now, if you have ever been poked by one, you know how much it hurts. A buddy came over one day with a pair of gardening clippers and asked if I wanted to build a fort. I said "Sure, but what are you doing with the clippers?" "We're going to use them to build our fort!" he replied. Where I come from, you need a hammer and some nails to build a fort. I told him there was no way I was going into those bushes and get all scratched up. He laughed, took his clippers, and started to cut a hole under the bushes to make a path. Once I figured out what he was doing, I started to help him create the tunnel. When we had gone about 50' into our tunnel, we began to create an open space under the canopy of berry vines and leaves. This created a large shaded area that was nearly invisible. We would stay in there for hours and eaves drop on people passing by.