The one-wheel tank is probably the only tank ever made that looks safer to fight against than to be inside. Designed by the Germans, the one-wheel tank was supposed to enable a single soldier to fire two machine guns at once, while protected within an armoured sphere. As the name suggests, the vehicle was driven by a singular wheel that ran around the entire thing. Thankfully, the one-wheel tank was never more than a prototype, due problems with balance and steering.
