* AssPull: Seriously, the twist at the end ''does not'' make sense. It just comes right the [[PrecisionFStrike fuck]] out of nowhere.
-->'''Mike''': The "creeping" part is apt, but the "terror" is just not happening.
* SpecialEffectFailure: The titular "terror" is a space creature who [[strike:eats people]] has people climb up into its maw.
** A monster made primarily out of ''carpeting''. Supposedly, the people operating it often suffered from heatstroke.
* TroubledProduction: The original monster design was lost, the original soundtrack to the movie was lost (a debunked rumor was that it was lost in Lake Tahoe), there were arguments between Allan Silliphant and Vic Savage over the direction of the film, and Savage himself being sued for fraud before the film's release!
* WhatAnIdiot: In an attempt to stop the transmission of humanity's biological data, Martin rushes into the UFO, loaded gun in hand--[[TooDumbToLive then tries to ''pistol-whip'' the computer]]. Needless to say, this doesn't work.
-->'''Mike''': Hey, there's ''bullets'' in the other end of that thing!