YMMV / Reptilicus

  • Special Effects Failure:
    • The quality of the footage used for Reptilicus is so much lower than the footage for the rest of the film that it looks like it was shot for a different movie, with no apparent effort to composite the shots to make it seem like the soldiers are even in the same universe as it, let alone shooting a thing right in front of them.
    • The green slime that is shot out of the monster's mouth is not only horribly out-of-place, but looks like stop animation when it happens.
    • One of Reptilicus' victims turns into a cartoon-like outline as he is devoured.
    • The Danish version of the film has shots of Reptilicus flying that were cut out of the American version for looking too ridiculous. Think about that for a second.
    • The monster itself can fall under this to several people. On the other hand, it's actually a fairly accurate copy of traditional Norse dragons.
  • Stock Footage Failure: Most notably the montage of ships allegedly destroyed by Reptilicus during its rampage. Mystery Science Theater 3000's riffing even points out that several shots were footage of ships sunk during the Suez Crisis, which would have been even more obvious to viewers watching in 1961.