Revealing mistake: During the last chase scene, pursued by the Nazis, the Bluesmobile stops short of running off of the bridge. You can see the steel guide rails behind the front wheels which will help the car get its front wheels back on the bridge when he slams it into reverse. (02:10:45)
Revealing mistake: In the beginning scene when they jump over the drawbridge there is more than a foot of space at the bottom of the rising bridge. No car, no matter how big, could have cleared that space without flipping over. Also when they land on the other side you can see a "flap" at the bottom of the bridge which would allow the car to drive over it. (00:09:40)
Revealing mistake: In the mall where the police car is spinning around on its roof (when the cop says, "They broke my watch"), you can see there's a separate circle of floor just larger than the car's roof, upon which it is rotating. (00:31:47)
Revealing mistake: In the last scene where we see multiple police cars pile up under the L-platform, at one point you can see the boards that allow some of the cars to drive on top of the lower cars. (02:08:30)
Revealing mistake: During the big chase scene at the end, right before the Nazis accidentally drive off the bridge, the Bluesmobile is seen doing a backflip over their car. Watch carefully as the Bluesmobile first lifts off the ground - an air-ram is visible firing under the car, which causes the car to begin the flip. (Note: This scene has been cropped in some releases so that the air-ram isn't visible, but it is still present in other releases of the film).