The 'chair' is meant to stop one's heart... not fry them.
As we know... volts do not kill someone... amps do. I suspect if 460V at 100A (or for that matter 40A) hit someone... it would do strange things to their body.
Ever see that thing about popping a hotdog? The power co shows it to linemen. They put a hotdog between probes and hit it with 8700 volts (what is usually on the lines just before the Xformers that feed your house). Hotdog explodes instantly when hit. Literally no parts larger than the end of your pinky left.
The human eye is the most sensitive part of the body exposed to air... it probably is the part which reacts the worst to external forces also.
Just my , not arguing with anyone.