I was on board a ship which sailed up the Loire to Nantes in France and it was my job when we came alongside to connect up the ship/shore phone lines.
The main problem with this is that the lines often get chopped and broken, so its usual to try find something to run them through something like a culvert, or over something out of reach like a crane.
The cranes were not going to be working over the weekend of our visit so I climbed up the crane ladder dragging the shipside cable with me, then I went down and dragged the shore side cable up to the same place and tied them together before I fitted the connector block.
Now picture the scene, a young man of around 19 years old, halfway up a crane, watching all his mates some 50 feet below him, all going ashore for a few drinkies.
I was eager to get that job done, I can tell you, so I got my screwdriver out and connector block, and found I hadn’t got anything capable of stripping the insulation from the wire, it was a fairly precarious position anyway as I had to keep holding on with one arm and was leaning backwards a bit.
I looked down at the ship, and I wasn’t inclined to clamber all the way down, back on board, back into my work section, unlock it all, dig out some snips and then lock up and return to the crane as valuable drinking time was passing.
Well, my reasoning went like this, since the phones were not connected, no-one would be making any calls anyway so it would be ok to strip the insulation using the good old electricians standby, my teeth.
My reasoning was faulty someone did try to make a call, 50V dc isn’t all that much, except when it rattles your jawbone whilst you are trying to hang on for dear life 40 or 50 feet above the ground.
They gave up after a a number of ring tones and I should have taken the wire out of my mouth, except I was still getting over it, when they called again.
Its not easy to pull a wire from your mouth with one hand whilst your jaws are clamping down tight, and youre trying your very best not to fall to your death.
After that I climbed all the way back down and got the proper tools.