Other mistake: In the scene where Nico and the other agents are at the meat place, they are being fired upon by the drug dealers. In one shot we see a bad guy shoot a cop on a metal staircase. Look in front of him, and there is a round-like object on the staircase This object moves to the right between shots.
Visible crew/equipment: In the middle of the film when we see Nico just after he has beaten up a load of bad guys in an alley. He gives chase to a guy who is fleeing on foot, now when the bad guy runs past a shop window on a street corner and Nico runs after him, in this shot there is a reflection of the camera crew on the back of a trailer.