Tailkinker

Corrected entry: The whole premise of the ending was based around giving the mothership a virus to take out the shields. However, given that the "electrics" had only very recently come on in the Area 51 spacecraft, there would have been no time for anybody to have reverse engineered the computer system and alien programming language, let alone for David to come in at the last minute, manage to guess off the top of his head what part of the mothership's system controlled all the shields, find a vulnerability in their code that could be exploited to switch them off, and then create the virus to do so.

Corrected entry: In the opening scene, the alien craft slowly flies over the Apollo 11 placard on the moon, and there are footprints in the soil. The spacecraft causes vibrations that disturbs the soil around the placard and the footprints. There is no sound in space (or on the moon), and the moon's atmosphere is almost a vacuum, so the soil should not have been disturbed in such an extreme manner. This is deliberately done for the dramatic effect.

Corrected entry: That alien suit is rather odd: it needs to be cut open with a razor sharp knife, then the alien is covered in a fleshy mass, however the suit is so weak an alien gets knocked out when it gets punched.