That eye-ripping thing gave me a really weird feeling…in my eyes...
Bleeck. And I'd have to say that Kaori's death in the Anime Akira was the worst thing I've seen. It was very violent, but what made it worse for me was that I'd gotten attached to Kaori and felt sorry for her whenever she was hurt in some way. For me, the worse kinds of death are those that happen to characters I care about.
That said, Tetsuo getting his arm torn off was pretty horrifying.