Factual error: West and Gordon are outfitted with massively powerful magnetic collars. Somehow the two collars don't interact with each other at all until they try to remove them, when they prove able to attract each other from at least 20 meters. Gordon rationalizes this by saying that they accidentally reversed one magnet's polarity, but if this were so then the magnets should have originally opposed each other with the same force, instantly throwing each other apart as soon as they were brought within meters of each other. Nonsensical.
Factual error: Gordon shines a light through the back of the disembodied scientist's head to project his last visual image onto a screen. When the image on the screen is inverted Gordon remarks that "Refraction of the lenses causes the image to appear upside down". True; when an image passes through the lens at the front of the eyeball the lens inverts the image and it is upside-down when it hits the retina. However, Gordon is projecting the captured image on the retina back through the lens of the eyeball and onto the screen. When the image passes back out the lens would invert the upside-down image and return it to its proper orientation. The image should have been right-side up when it hit the screen.