During the big chase scene with the black Navigators, they show all the chase up close to the cars, but when the cars crash into stuff and flip off the side of the road they are from afar, you notice that when the actual crash occurs, it is not a Lincoln Navigator. In fact, it's a Ford Expedition. This is because Expeditions are cheaper to buy and crash than expensive Navigators, and all the bullet holes are special effects, they do in fact flip a Navigator at the end, which is the last one. And they do screw it up, but the others were Ford Expeditions. The reason is the trucks are similiar size and the head lights look similiar, and because it's night out, it is very diffucult to determine if they are Expeditions or Navigators. But I assure you that they are Fords.