Revealing mistake: Despite receiving several shots and crashing against other boats, Elise's wooden boat structure remains undamaged.
Revealing mistake: After the Italian cop tells the British one that Frank is going to be killed, Frank climbs a rooftop and white protective tapes are visible on the sole of his feet.
Revealing mistake: The scene where Frank is chased across the roof tops is shot indoors. First, the light and shadows are very bright - but in the outdoors scenes it is cloudy, and there are no clear shadows. Second, the shadows show almost horizontal lighting - a position the sun does not have in Venice in late morning.