'So what kills voltage or current,"

Neither.

It's a combination of factors:
- length of time "hung up"
- amps passed through the body
- path current takes through body

Here's a 13 minute long video: http://www.electrician.com/safety/electricalsafety_01.htm

*****WARNING****
The video contains graphic images of the effect of electric on the body...not for the faint of heart ~ if you can't bear to watch the video, you have NO BUSINESS being IN BUSINESS.

~~ CELTIC ~~
...-= NJ =-...