Unkept Church Fence

This is an unkept fence between a small church and a business in Bedford. I found it peculiar that this bush was here. The fence stretches for at least 200 feet, yet there is only one bush. And the spot where the bush is isn't any worse than the rest of the fence. So why is it there? Also, I have wondered if this "bush" was really just a tree that hasn't been trimmed.