funny scenes

What's up with the fake smoke when they show the Mercedes backing up in the beginning of the main chase. I'm assuming cause the close up of the car backing up shows real smoke, and in the next shot there was no real smoke, maybe someone figured it didn't transition well. But why not re-shoot the backup scenes so it transitioned well and didn't look completely fake.

Another scene that's even worse, Gregor was in that bar setting up the meet (in the coliseum) to sell the case, and he has some lackey walk down to the buyers and tell them to use the phone. When Gregor holds his camera up to his face to watch them in the square below, they show crosshairs to imitate a camera, but the angle is below them and REALLY close up, AND the camera is panning along with them instead of standing still. It's such a obvious flub that I lol every time I see that scene.

Ronin is one of my favorites. It's such a good movie that I chalk these flubs up to funny/odd quirks. I wanna say there's another but I can't think of it at the moment.