Factual error: The General brandishes a six-shooter pistol with an enormous silencer attached to it. He's a career military guy who should definitely know better, so he gets a failing grade in Basic Weaponry 101. Silencers don't work on revolvers. (00:34:50)
Revealing mistake: The injured Spain falls and tries to crawl away from the alien, leaving handprints in the dust on the floor. Just to his left, you can see several handprints already on the floor from previous takes. (00:47:30)
