Revealing mistake: When Kurt and Elisabeth are looking at the painting of the Third Reich caricatures, in the shot focusing on them, a little girl in the background can be seen glancing at the camera. (00:01:45)
Revealing mistake: Once Steve gets out of the police car and start shooting at the first merc, the merc hides behind a payphone. Many of Steve's shots can be seen sparking off the payphone that the merc is using to take cover behind, however not one single bullet hole or dent ever appears. (00:46:00)