The Great Panjandrum
Most of the weapons on this list are terrifying because of the damage they could do to your enemies. But the Great Panjandrum, a British military project from World War II, was just as threatening to the Allies. When Hitler’s forces built a massive concrete wall ten feet high and seven feet thick along the Atlantic, Churchill charged the Directorate of Miscellaneous Weapons Development to invent something that could vault over it and explode.
Their solution was the Great Panjandrum, a rocket-propelled rolling wheel with a deadly payload. Unfortunately, the rockets tended to come loose and fly everywhere, and the Panjandrum never got to go over that wall.