Were you a boilermaker? I’ve had to crawl into some pipes to weld them up and it was okay as long as I could see the light at the open end.
Nope - just a grunt ;’}
My grandfather worked on the railroad in Pennsylvania. His job was to climb inside steam locomotive boilers and clean them out with caustic chemicals and a big steel brush. He died at 42. His relatives who were coal miners said they would rather take their chances with black lung disease than have his job.
Did you turn in your brass at the end of your shift?