It brought me back in those years when, as a mechanical fitter, I was working in the oil/chemical plants maintenance... And, thanks to your writing, I remembered very vividly that time when I had to go down in a pit full of calcium carbide (for acetylene production) and where I felt I was going to die suffocating... A few weeks later, a friend of mine was severely burnt because working in a tank, he had told his foreman he was suffocating and the idiot/criminal had sent him an oxygen hose...  

"Dieu se rit des hommes qui se plaignent des conséquences alors qu'ils en chérissent les causes" Jacques-Bénigne Bossuet