Well at least we know how he derived his forum name, Jeeezus Doc how are you still alive??
The one that really shook me and made me a safer man was in a huge engineering shop. Sent to attend to an intermittent facing lathe which is basically a slowwwwly rotating four tooled cutter head used to true up the ends of large pipes pre welding. Shift had ended and there were only a few of the piece-work boys still around.
Should mention the place was a total sh!thole with stillages of razor sharp sheeting, rolls of steel sheet unrestrained, knackered overloaded palleting, f*cking oil, swarf, bar-ends and you name it scattered randomly dank and with meagre light from the remaining high flourescents that were still working. Place was a death trap for want of basic house keeping.
Anyway pinned the fault down to the ancient moving iron starter on the front of the lathe, as I took the cover off a mountain of swarfed spilled out! Right that might explain a few things! Mucked it out and re instated the power to do a quick functional test. The buttons on the starter had long since been smashed off and the operators used to use a piece of dowel poked in the vacant holes to start & stop the bloody thing!
I leaned over to bring the machine's inspection lamp to get some light onto the starter and in so doing dislodged a pile of steel swarf above the starter. It fell like a shower of conductive rain into the starter, the contactor thumped in and the facing head immediatly picked up my sweatshirt and started to whinch me off my feet towards the cutter head at eye level. I braced against the pillars as hard as I physically could and the machined peeled the sweatshirt in two off my back and stopped at the neck band, it then started to lift me over the top by my neck towards immolation on the end of 4 x 6" long carbide cutting tools! FACK ME RAGGED I'M GOING TO DIE NOW! was what went through my mind, all that came out of my mouth was a strangled yelp. With about a second to go before I became dog mince I aimed one good kick at where the stop contact was and obliterated the thing. The contactor dropped out but the rotation on this big boy didn't stop immediately and it was another half a rev before it finally came to rest.
Machinery is unforgiving, it just doesn't care. What it did do was plant a little electrical guardian angel on my shoulder and every time I'm about to thoughtlessly push a button or re-instate a supply he taps me on the shoulder and says:
"now hold on there Tonto! are you absolutely sure about what is going to happen next?"
It STILL shivers me at the thought as it rightly should, if I hadn't thought to try and operate that E-stop I'd have been chopped liver as there was no-one else around to do it. I had no right to walk away from that one.