Continuity mistake: In the freeway chase scene watch the boat's engine compartment cover. When the Mack truck knocks it off its trailer the lid comes off but then the boat gets hit by the car and turns perpendicular to the road and you see it come off again. (00:36:25)
Continuity mistake: Right after the semi is first shown chasing the black Suburban you can see a considerable amount of steam/smoke coming from the Suburban's engine compartment, but none later in the chase scene.
Continuity mistake: When Syd arrives, the dog is swimming around in the pool in Marcus's house. In the next shot, just before the pool collapses, the dog is out of the pool and isn't even wet. (00:18:50)
Continuity mistake: When Tapia is giving the mural artist a dressing-down, his daughter has a book in one hand for most of the scene, but when the shot changes to one from above Tapia and his daughter, the book changes to the other hand. (02:03:15)
Continuity mistake: In the chase where Mike and Marcus are chasing the mortuary van with the dead bodies in it, the doors at the back go from being open to being closed when the van screeches round a corner, then to open again on the straight. (01:26:55)
Answer: Buick Blackhawk concept car.