Now this was a big bang!
Way back in the 70’s I was working in one of the Philips military companies who were involved in the Clansman Radio systems. To filter out all the noise from the tank power infrastructure they suppled a power conditioning unit. This consisted of some of the largest electrolytic capacitors around – they were about 15cm high and about 10cm round. One day the production staff had wire a couple of these the wrong way around. After being turned on in the test area a few minutes later there was an almighty explosion – not a bang, an explosion that shook the whole factory – and it was a large factory. Once the cloud of smoke had cleared everyone started looking for the remains of the test engineer. Just as we got close to the bench, a waving hand with a white handkerchief came up from under the bench - he had just managed to see the capacitors bulging moment before the explosion and dived under the bench. This is a true story.