Continuity mistake: The location of the FireBrand tower keeps changing throughout the film. 1:30 - the tower is in Lower Manhattan, south of the World Trade Center 2:55 - As Kevin Spacey lands, the tower has moved closer to the World Trade Center (side note - the shot immediately before this showed him falling towards midtown Manhattan, not the tower) 3:45 - the tower has moved further north towards midtown 4:50 - the tower appears to have moved back to the position it was in at 1:30. 5:25 - the tower has moved back to it's position at 3:45. 53:25 - We are given a view of the tower from their Central Park penthouse, and it has apparently moved much closer to Central Park (right next to One57 on the other side of Manhattan island) 56:45 - the tower has moved back down to its position at 3:45 and 5:25. 1:17:38 - I'm not entirely sure about this one, but you can briefly make out the two pools of the World Trade Center memorial, which would put the tower at its location at 2:55. 1:18:00 - the tower has moved to the exact location of One World Trade Center (therefore making that building disappear). 1:18:05 - the tower has moved back to its position at 2:55 (now One World Trade is visible).
Factual error: Kevin Spacey states that his company's new tower is the "tallest building in the northern hemisphere." The tallest building in the world is in the northern hemisphere - the Burj Khalifa, which has held that title since 2008, and is about 830 meters tall. Judging by the size of the new tower compared to the other buildings in New York, this building appears to be only 600 meters tall. (00:04:30)
Continuity mistake: When David is explaining to Ian about the rival company being taller, he draws an antenna onto the window with a marker pen to explain how it is taller. When David looks at the window with the marker pen drawing of the antenna later in the movie, it is a different shape than before. (00:07:45 - 00:31:40)Casual Person