The Panjandrum was an experimental weapon developed in the U.K. during WWII. It’s a pair of large wheels with rockets attached to them that roll it at great speed towards a target. Upon reaching the target, the payload (a large bomb) detonates. Here is actual footage of a prototype being tested:
Given how rapidly the thing spins out of control, it should be no surprise that the Panjandrum was never brought to the battlefield. Evidently, the English have claimed that they never really intended to use it, and the tests were intended only to confuse the Nazis. Possible, I suppose. That would explain why they’re testing it on a public beach where it nearly murders a friendly dog.
I’m a little surprised these were never picked up by the Monster Truck crowd in the United States.