I breathed lots of decomposing polyurethane, polyvinyl chloride, polystyrene and similar organics. I also like to see what sulfuric acid did to things. Fortunately, I had aspirated enough spent gunpowder to counteract all that stuff..
LOL :) My dad used to wear fire suits in the military with asbestos. He’ll be 80 next year. Not that I would recommend that, but some people’s constitutions seem to be tougher than others.