%Slideshow-2921% A big budget doesn’t always guarantee a perfect movie — especially when special effects are involved.
Some of the biggest sci-fi movies of the past four decades are littered with plot holes, continuity errors, and, in some cases, blatant gaffes. For all you purists out there, here’s a roundup of some of the sci-fi genre’s most noticeable movie mistakes.
As usual, all photos are courtesy of MovieMistakes.com.