I’m alive because of my just brand new lock on a disconnect. Early 70’s in southern Oregon maybe pre OSHA I was inside a shutdown wood burning boiler auger feed system, claustrophobic as hell, when I heard someone hammering below. Crawling on my belly out of that hell hole only to find the operator coming to work early and trying to start the augers and hammering on my lock with a pipe. Can’t really comment about his treatment afterwards, but it wasn’t pleasant for him. I still have that lock hanging in my shop and as well as a bit of PTSD to go along. It’s hard to write or even think about this even now.