Apologies for topic first – electrocution

Yes I know agony, but surely guaranteed using very high voltage and right conductor. I could stand pain if I know it means the end.  Fishing line? I looked up on internet but not 100% (what is?) But then their MUST surely be a voltage high enough wearing the right materials/touching with metal or whatever.  I badly need out.   Any ELECTRICIANS out there/anybody with knowledge on actual cases of it happenning.  I know there are accidents.  But surely those electric pylons carrying telephone wires will do it? Or an electrified rail.  Power sources a problem.  Yep, practicality is going to be hard to actually get to the source.