When I was a supply clerk in the Army I looked thru the NSN catalogue and they had an “atomic bomb simulator”. It was described as being 6 ft long, aluminum tube. It had to be buried in the ground leaving only 4 to 6 inches above ground, with no over hanging tree branches or any wires over the area. When it detonated it would create a blinding flash, a massive explosive sound, and a mushroom cloud that would rise about 400 to 600 yards. The cost was $6,000.
I always wanted to order one of those. The CO always just singed off on whatever requisitions we put on his desk. But, I figured that not many of those were ever ordered, and once it actually got to the supply depot they might put in a call. So, I never ordered it.
Reminds me of the M*A*S*H episode and the Pizza Oven...............
hahahahahahahahaha!