!Per wiki policy, Administrivia/SpoilersOff applies here and all spoilers are unmarked. Administrivia/YouHaveBeenWarned.

* The original Destro's fate is pretty horrific. The French essentially heated two halves of a metal mask until they were red-hot, then jammed them onto [=McCullen's=] face, complete with the audible sizzling of burning flesh.
* The Nanomites CyanidePill, which (very graphically) eats away the afflicted Neo-Viper's body in under half a minute, rapidly stripping away his skin to reveal the muscle and then the bone beneath, until he just dissolves into greyish dust filling the remains of his suit.
** Similarly, Destro's transformation. Aside from some pretty [[FacialHorror horrid-looking facial burns]], we're treated to the sight of metal visibly growing out through the burned flesh until it covers the entirety of his head.
* The Eiffel Tower collapsing.
* The flashback showing Rex attacking his own sister in her sleep and injecting her with brain-washing nannies.