Recently, I've re-read The Inferno after I read an insanely good webcomic about Hell and it's inhabitants called Jack. Now, while I prefer Dante's ideal of Hell, with the ironic punishments and everything, I was slightly off-put by the lack of true torture and pain within it. The worst I can remember is the trees within the forest of Suicides, a bunch of thorny trees that a number of the damned get chased through by hellhounds, and every soul who has killed themselves is not only impaled within the trees, but also feels immense pain when their branches are broken by the pursued souls and the hounds. It wasn't there for very long and they didn't make much of it. For comparison, I remember Indiana Jones IV having a dude getting eaten alive by a living carpet of ants, and that movie was meant for kids.
In the interest of our collective sadism as film/game/novel/cloud/spider enthusiasts, what is the most horrific, nightmarish, and shudder-inducing death or sensation you can think of or have seen happen?