Check out the merch store:
https://llbdmerch.com/
A British engineer attempts to create a weapon for breaching the Atlantic wall. He does not succeed.
Sources:
Brian Johnson. The Secret War.
https://www.wired.com/2015/01/well-didnt-work-rolling-rocket-bomb-designed-kill-nazis-almost-killed-dog-instead/
https://www.military.com/video/operations-and-strategy/second-world-war/the-great-panjandrum-scares-a-dog/1123500263001
https://allthatsinteresting.com/panjandrum
