A Stealthy Colossus is a character or machine that is ginormously huge (relative to their size category, anyway) yet somehow manages to stay undetected whenever they want, no matter how gigantic or noisy. Jabootu's glossary calls this trope "The Stealth Monster Rule". While a Barbarian Hero might still conceivably sneak up on someone, these guys go even further. If the setting is comical, they will tiptoe behind their prey. Otherwise, they will enter the scene in a fittingly dramatic fashion, possibly with a Surprisingly Sudden Death. This can either be used to establish the character as a Genius Bruiser or merely for Rule of Scary. Compare Surprise Vehicle and Suspiciously Stealthy Predator. Related to Impossibly Graceful Giant, Acrofatic, Stealth Expert, With Catlike Tread, Nobody Here but Us Statues, and possibly Offscreen Teleportation. Compare/contrast Highly-Visible Ninja.