Here's an add-on to the story I always thought would be so cool in the film:
Wouldn't it be cool if - while Jacob was speeding through the Northwest in Edward's Aston Martin Vanquish - Tanya was running though the woods, fast as lightning, and caught up with him? Then Tanya gets in the car and Jacob lets her drive Edward's beloved car. And Tanya is speeding like a mofo - to the point where Jacob is holding on for dear life - and Tanya is laughing at him the whole time. But she's doing it because she's so devastated that Edward doesn't love her - and it makes her feel good to know she's driving his precious car.