Inspired by this image:
A man is terrorized by literal demons of hell. The observer of the scene could be his family, helplessly watching, or a passerby, related (by association or blood) or not, for some reason traversing the fiery realm (think Dante, but this is another type of hell, where those punished are not necessarily deserving of their torment - Dante at one point increased the suffering of a soul confined there and was praised for it).
The man is forced to his knees, his arms bound behind him or held out in the fashion of a cross (be it by small, gremlin-like demons or an obvious show of unseen power by the main tormentor - demon jedi mind trick).
Next to the man is a smoking brazier filled with burning coals. A large demon, standing 7 or more feet tall, with flaming red skin, black horns, bulging muscles, large fangs, and glowing, malevolent eyes stokes the coals, throwing a shower of embers into the air. The demon produces a wicked iron mask, the inside surface studded with half-inch long needles of iron, and pulls a length of red hot barbed wire from the bed of coals. He places the mask against the man's face and lashes it tight, winding the burning wire around his head several times. The man screams in agony. His body thrashes against the ground, eyes wide through the holes in the mask, but he is unable to resist. Smoke rises from the wire as it slowly cools against the blood dripping and running from the base of the mask.
The demon then grasps the man's neck in one massive, black-clawed hand and shoves his face into the coals. The screams pierce the air and the man violently shudders and spasms in vain against the awesome might of his captor as the mask glows ever brighter with the heat. With its other hand, the demon raises a dark chalice and, with an unholy supplication, pours the liquid across the back of the man's head. Instantly, the liquid bursts into flame and the demon releases his grasp. The man springs back from the brazier, rolling across the ground screaming, but no relief is to be found. His head is in flames as the scene fades to black.
Man that would suck. This is exactly the reason I like paladins. They exist specifically to defend against and defeat that kind of inhuman evil.