Anyone ever heard of a Dum Bull. My Grandfather use to talk about mischivious boys making them when he was a kid. He was born in 1893. You took a wooden nail keg and with both ends open you would stretch a green animal hide across one end and nail it down tight. Leave the other end of the keg open. Let the hide dry. What you would end up with is something simular to an indian tomtom. Then in the center of the stretched hide you make a small hole and run a stout cord through the hide and tie a knot on the back side so it will not pull through. You grip the cord firmly right next to the hide and pull back firmly but allowing the cord to slide through your hand causing it to vibrate. It is suppose to make a horrible noise between a bellow and a growl and can be heard for a long distance. If done properly every thing in hearing distance would be terrified. Cows would bust out of their lot, chicken would stop laying, horses and mules would tear up their stalls and people would haul a$$. Anyone ever made one.