Re: "what we do with it is our fault"
The best (if you can call it that!) jolt I ever managed was whilst on a course at the local technical college.
We did a module on TVs, including fault finding, which inevitable meant sometimes having to diagnose a fault on a live running TV. CRTs back then of course.
We had these rather old black and white CRT TVs, donated I believe from a local rental company once they were no use for renting out anymore.
These consisted of two large PCB boards, one in the bottom of the case (tuning, audio etc), and one mounted round the neck of the tube (coil controls, electron gun etc).
Nothing surface mount and a single sided board, all discrete resistors, capacitors, transistors etc. All with legs poked through the back of the PCB, and soldered in place. Judging by the random leg lengths, trimmed on the back of the boards, all components looked like they'd been fitted by hand one at a time, rather than a solder bath etc. Like I said, quite old.
I was taking some measurements with an Avometer on the tube component board, which had it's back facing me, components facing the inside of the case, using a couple of pointed probes, tracing a voltage through, pushing the probe against the solder pads on the back of the board. Sometimes this took a bit of pressure to push down to make a contact.
Probe slipped of course! Hand hit the back of the board, fingers first, got a component leg jammed into my middle finger UNDER the nail! Just ouch from that.
But of course turned out to be one of the high voltage, high frequency lines, my entire right hand and arm just locked up. Basically I froze in place, apparently with a face looking like a manic Cheshire cat, big fixed grin!
Thankfully as this was lab work, we were all in pairs, and there was a big red power kill button on the desk, which after a few seconds, once my lab partner realised I wasn't actually joking around, he hit, cutting power off.
Rather sore finger for a few days, but otherwise no harm done, well none that I know of!