For many years I was a television repairman. In the early 70s I worked for a large appliance store that sold RCA & Magnavox as well as appliances. In shop they had three test jigs, vacuum crt monitors with cables down so techs would just bring in customers chassis and we repaired on the benches connected to test jig. Each had a high voltage meter that went up to 40kV. Normal was 20-30kV. One day I was working on an RCA that had high voltage regulation problem and turning it on the 40kV meter was pegged. As I reached up to unplug the arcing anode lead the bench ac outlet metal strip was pressed against my "equipment".
Immediately there was a loud snap and the pain was amazing!
It was like being kicked in the groin. I didn't pass out but everything went dark for a second or so.