Abfolgefehler: Joe's computer occasionally displays images of Liberty taken by a camera he has set up somewhere, presumably in his sniper's nest. But almost every shot from this camera is panning or tracking, and most are also obviously from a much lower angle than Joe's position. Some are actually looking up at Liberty from below.
Abfolgefehler: After the SWAT team has cleared the park of pedestrians, there are several shots of Liberty standing by the cart with people walking by in the background.
Audio-Visuelle Asynchronität: Towards the end of the film we see Liberty drop her phone and headset on the ground but in the next seen we see the headset still in her ear.
Fehler, die von Charakteren gemacht werden (möglicherweise Absicht der Filmemacher): Liberty says, that the sniper rifle of Joe is a .223 (refers to the caliber of the weapon). But in reality it is an AR-10(t) sniper version of the AR-10 which has a caliber of .308 (7.62mm).
Abfolgefehler: Despite Liberty changing the direction she's facing several times during the initial stand-off with Joe, the red dot of his laser sight remains on her chest.
Fehler, die von Charakteren gemacht werden (möglicherweise Absicht der Filmemacher): Even though the red dot of Joe's laser-sight is on her chest, Liberty repeatedly scans buildings behind her while trying to spot Joe.
Verschiedenes: When Liberty first walks over to the hot dog stand and picks up the cuffs, the angle of the view through Joe's scope would imply that he's looking out of a 2nd or 3rd story window at most - which would be an utterly impractical angle for a sniper to be overlooking a crowded area.