Trivia: After the truck with the gold in it, drops from the street and people scatter and scream, there is a man dressed as Spider-Man on the street. (01:25:35)
Continuity mistake: In the sequence where the three Minis are being driven around a waterway as a rehearsal for the job, the auxiliary driving lights (the ones fixed in front of the radiator) go off and on. In the first shot all the cars have these lights on, in the next external shot the white car has them switched off, then back on again for the immediately following shot. Shortly afterwards the red Mini has these lights off for one shot - then back on in the very next one. (00:58:15)
Continuity mistake: In the scene where "the Napster" is changing the street lights, there is a shot where armored truck 128 is slowly moving behind a grey or white Saturn (right after you hear on the radio "Truck 128, what is your progress?"). In the next shot, where one of the men in the truck says "Ah, get us outta here," you see Napster's computer. On the computer, when you see the street camera looking down onto truck 128, the Saturn is gone and all the surrounding traffic has moved. Truck 128 is one lane closer to the curb, and the car and SUV that were on 128's right in the live shot appear to be to the truck's left on camera. Other cars are gone or have changed places as well. (01:24:55)
Continuity mistake: During the Venice water chase, Charlie's boat goes under a bridge toward two green tugs. The tugs are moving apart to let him through, but when he comes out from under the bridge, the two tugs are close together and off to one side. In the very next shot, they are far enough apart to allow Charlie's pursuer to pass between them. (00:14:50)
Visible crew/equipment: When the Mini Coopers jump out of the sewage tunnel, you can see the black ramp they launch off of to give the tunnel exit more of a dramatic effect. (01:36:15)
Visible crew/equipment: When the crew first get the Minis and are testing them out, as Stella gets into the car and the camera pans down you can see in the front passenger window and rear, the reflection of the camera and an older crew member in the back. (00:54:05)
Revealing mistake: At the start, Rob and Lyle go under a bridge towards the garbage men and correctly leave a wake behind them in the water. When the shot changes to show the pursuer following them, the water is still and there's no sign of the wake from Rob's boat. (00:15:10)
Continuity mistake: In the first heist we see a quick shot of the garbage men getting into position followed by a shot of John and Charlie in the water moving some of the gold. In the shot of John, the way he holds the current gold bar changes between shots. (00:14:40)
Revealing mistake: Several times in Venice, you can see the wake of the film crew's boat in the water. (00:11:20)
Visible crew/equipment: When the minis jump in front of the subway you can see a small ramp appear before the blue mini jumps. You then see the blue mini land on boxes.
Continuity mistake: When Charlie is a kid, a kid knocks another kid's book out of his hands. The book hits the lockers and one of the lockers swings open. When it cuts, the locker is closed again. (00:31:20)
Answer: They are flying the Italian Civil Ensign, which is used by civilians on water. The emblem in the center of the Italian flag when used on water are the Arms Of Savoy, the former royal Family of Italy.