Visible crew/equipment: During the long car chase, after Freya tells Matt that he's an awful driver Matt makes a sharp right turn and the car chasing them stops short, and when they back the car up we can see the reflection of a crew member wearing a hat (perhaps the cameraman) on the car window.
Continuity mistake: When Freya and Matt escape from Contini's chateau and board Matt's chopper, Freya is wearing white flats with short black heels, but after the chopper lands atop the trailer on Contini's train Freya's shoes are completely flat.
Revealing mistake: While Contini's train speeds along the railroad tracks, in the train's cab when Contini opens the floor's trap door before Freya walks in and later when Matt pushes Contini through the open trap door, there are closeups of the ground below and there are no railroad tracks whatsoever.
Revealing mistake: After Freya and Matt escape from Contini's chateau and are flying in Matt's chopper, we can see the shadow of their chopper being cast on the ground below, but the problem is that Matt's chopper looks nothing like that helicopter's shadow.
Continuity mistake: During the long car chase and later when Yu-Rang and the other baddies are in the cars chasing after Matt and Freya, their cars' rear-view mirrors keep vanishing and reappearing, between closeups and wide shots. Additionally, during some closeups of Matt and Freya the car's windshield is gone to provide a better view of them.
Revealing mistake: When Matt and Freya are attacking the compound, at one point he goes outside and throws a "hanky panky" grenade at what looks like a garage door. He throws himself over a hedge and a moment later the grenade explodes. When he is getting up, the "ground" is obviously a cushion covered with fake grass.
Continuity mistake: When Matt and Freya are in the car chase, the driver's side of Matt's car is badly damaged. After escaping their pursuers, they drive off (in the same car) and return to Copenhagen. When Matt pulls into town, the side of the car is intact again.