Visible crew/equipment: When they get into the tunnel/water drain, you can see the crew on the left side when switching the scene. (00:39:00)
Continuity mistake: He drinks from a water bottle and finishes it. The next cut it's got water left in it. (00:22:00)
Revealing mistake: Right at the beginning of the movie, an alien blasts Lieutenant Smalls and he drops his rifle. The weapon wobbles, revealing it's a rubber prop rifle. (00:01:55)
Factual error: At the end, when the EMP explodes, the aliens are affected by the EMP but lights on the building and street lamps are still on. (01:19:35 - 01:20:15)
