Continuity mistake: During the car chase scene in the parkade, Salvano is hanging on to the rear of the car while Nico is driving in reverse. The car crashes through the wall, and Salvano falls off the car and appears to land on the subway tracks, causing a lot of sparks. After Nico is caught by the bad guys at the exit of the parkade; the car that had crashed through the wall is again shown; but the subway tracks are quite a distance away from the building where Salvano fell. There is no way he could have landed on the tracks.
Character mistake: When Nico comes out of the parking lot and gets caught by the police, right before he gets in the van and is patted down by the police officer, the police officer says, "she's clean", not "he's clean."