The rules were pretty simple: 1. It had to be built using household items Walt would have access to. 2. It had to operate remotely. 3. It had to fire THROUGH the car trunk and the wall the Nazis were standing behind!
And they were smart enough to have the show's creator Vince Gilligan on hand to make sure everything went smoothly!
So did it work?? Ch-ch-check out the video (below) and find out!