Plot hole: Gibbons ordered the 'Ahab' blown up. He justified it by it's better that they blew up a city if it stopped ten from being destroyed. Then why did they even enter the city and get as close to it as they could?
Plot hole: When Xander is driving onto the bridge, chased by the police cars, we see that there are police cars also blocking the end of the bridge to stop him getting away. How come none of them noticed the ruddy great ramp sitting alone in the middle of the bridge and moved it? It wouldn't take a genius to work out what he might do.
Plot hole: When Xander Cage is just about to try and get into the basement, two scientists walk out. One of the scientists says 'We are finished now - what about you?' The other scientist replies 'We will be done tomorrow' - yet just a few scenes later Yorgi uses the rocket to gas the whole room of scientists. How were they supposed to finish off their job? (01:12:55)
Plot hole: When Xander is explaining how he knew the situation in the diner was a set up he mentions the Wall Street guy reading the financial times on a Sunday when the markets are closed. However Xander just woke up in a diner from a drug induced sleep with no idea how long he had been knocked out, how would he know it was Sunday?