When Bob is seen from his right side, when he is watching
through the scope, the cap is still on the lens. When seen from his left, the cap is off. The cap appears and reappears all throughout the episode.
Bob fires a shot from a sniper rifle, no one hears it and it sounds silenced. Yet the rifle clearly does not have a silencer on it.
The plot takes place in Former Yugoslavic Republic of Macedonia, yet the police, the abusive father and Bob speak Greek, which is not a language spoken in Former Yugoslavic Republic of Macedonia. In addition to that, The flag of F.Y.R.O.M. is shown briefly and the police cars markings are clearly in Slavic.