Nightmare Fuel / Planet Hulk

  • The Spike-infected child.
  • Caiera having to fight off her mutating family.
  • The little girl Caiera is protecting getting reduced to dust on-screen after the Fantastic Nuke explosion.
    • It's slightly worse in this Troper's view, in that after the explosion, there is a small Hope Spot where the girl is still in her arms seemingly alive, then comes The Reveal and the Troper both feels haunted by the sight and has another reason to want the Red King dead.
  • The Red King's Karmic Death in the film. First, getting infected by his own bioweapon, then being subjected to Kill It with Fire by his own guard robots.

http://tvtropes.org/pmwiki/pmwiki.php/NightmareFuel/PlanetHulk