What do you think is there worst way to die?

[MammothBlade]

Having your whole body dissolved by acid. Not a very nice way to die at all. Blinding, flaying, and burning all at the same time. And if you are drowned in a pool of acid and it gets inside your orifices, well, even worse.

 

[Jakub324]

Scaphism... it's unbelievable nasty way to go...

http://en.wikipedia.org/wiki/Scaphism

Yes it involves torture but it's a method of execution, so I think it would qualify...

Damn, you beat me to it. That's one very slow end.

 

[SidingWithTheEnemy]

Flesh-eating parasites that devour you from the inside while they use your body as breeding ground.
That or being raped to death by a transsexual horny rhinoceros.