Ziggy Stardust said:
grisan said:
(never understood why a few seconds of force lightning should kill him).
Because the lightning caused his breathing apparatus to malfunction.
I have read that explanation several times and it makes sense, but I still think it should have been mentioned better in the movies or the damage by the emporer shoudl have been made more obvious. That's why I listed it as one of my main flaws of ROTJ.