[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/mr_igoes_death.png]]
[[caption-width-right:350:Congratulations, Jack. You just digested the bad guy.]]
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* The fleeing scientist injected Jack as a desperate heroic act to keep the miniaturized submersible out of the bad guys' hands, but from ''Jack's perspective''? Suddenly being stabbed and injected with an unknown syringe by a seemingly crazed stranger is pretty scary to think about, even if you aren't a hypochondriac.
* The final fate of Mr. Igoe. He and Tuck fall into Jack's stomach acids, and [[StrippedToTheBone the acid swiftly melts his flesh off his bones]] while Tuck is protected by his minisub, with him screaming in agony all the way.
* The facial transformation sequences have horribly squicky still-frames.
* Tuck's apt description of what ''precisely'' will happen if he doesn't escape from Jack's body before his air supply runs out:
-->'''Tuck:''' You're gonna wind up with this miniaturized submersible pod floating around your insides with this ''teeny, tiny human skeleton'' at the helm.
-->''[Jack retches]''
-->'''Tuck:''' Not a pretty thought?
* At one point, Scrimshaw proposes re-enlarging the miniaturized Mr. Igoe while still inside Jack...
-->'''Canker:''' Do you know the kind of ''mess'' that will make?!
* Even the PoweredArmor Igoe goes into Jack piloting is utterly horrific looking with its pincers. Igoe's facial expressions while flying the damn thing are ones of horrifying pleasure, in contrast to his Terminator-like demeanour for the rest of the film.