How electricity effects the human body is an interesting sidebar. I did a lot of studying (reading, not live experiments) on it at one time out of curiousity. Nerves use an electro-chemical process at the junction (synapse). So electricity impacts your nervous system. Touching a fence will often cause your arm to involuntarily twitch/contract. I learned to touch fences with the back of my hand, not to grab them, as the stronger muscle contractions to close your hand can keep your hand locked around the wire. That current, running through the wrong place such as the heart, will mess up the somewhat delicate process that controls heart contracts. This is one case where knowing CPR is helpful, as people who are thus effected have a chance of being revived by CPR (after the power is gone). Current through the brain is obviously a real mess, but it is not a common path for someone to get electrocuted. Current doesn't flow through the body uniformly, so what gets effected is not easily predicatable, although it does generally go from entry to exit point. It isn't just a simple matter of current that kills, that path is key. And that gets impacted by all sorts of things, frequency in AC being one in particular. This makes electrocution somewhat unpredicatable. Of course, on high power sources, such as lightning, the electricity will burn a path through the body. I always wanted to see an autopsy on one of those, I got to see some interesting autopsies, but never on a high voltage electrocution. My father (a pathologist, long retired now) said they actually will trace the electrical path through the body on those to see what organs were damaged.