Chris Weitz Reveals Five Secrets in the Film to Entertainment Weekly

4. Speedy suitor
''We did a little trick when Edward gets out of Bella's truck and they're arguing. We wanted to show Edward moving impossibly quickly, so we put Rob right next to the camera but out of sight, and used a double dressed like Rob in the driver's seat. When Edward gets out, it's the double, and then Rob steps in front of the camera, and it looks as if he got there faster than humanly possible.'' Click here to view the rest