tank where we filmed all the underwater sequence, that was in a 93° pool," Landes clarified. Cook and Landes performed their own stunts in both sequences. "My biggest fear is being trapped in a car underwater. So it was kind of cool to face my fear and all that," Cook divulged. "We took a couple of lessons with a scuba guide to be comfortable being underwater and breathing off the regulator," Landes enunciated. To avoid confusion with Larter and Carter, Cook was required to dye her hair brown for the role. "I like being a chameleon. It opens you up for so much more in this work. You don't get typecast," Cook professed. Landes also denied plots regarding Thomas and Kimberly's relationship. "It's kind of a protected relationship, more like a brother/sister thing than a love interest. They didn't want to go there, I guess. They did go that way in an earlier draft of the script but they didn't want it to seem like the cop is like lascivious or something. So what they have now, hopefully, is a little bit of chemistry and you get the idea that through tragedy something good will come. So it ends in an optimistic way, that maybe they can be together but there's no real love story," Landes articulated. Effects Digital Dimension took charge of the visual effects of the film. CG supervisor Jason Crosby pointed out that their studio was mainly selected for the highway sequence after the crew realized real logs only bounced about an inch off the road when dropped from a logging truck. "They were concerned about how they would make the shot happen, not knowing if CG would work. The timing was great because we had just finished a test shot of our CG logs bouncing on the freeway. We sent a tape to Vancouver and after seeing it the crew was convinced that any of the log shots could be done with CG," Crosby indicated. "It began with R&D on the log dynamics. Scripts were written to help manage the dynamic simulations with real world numbers for gravity, density, etc. The results were remarkably similar to the original logs shot in Vancouver, a testament to the accuracy of the software and the data we had collected, however the logs still lacked the 'jumping through windshields killer instinct' we were looking for. By tweaking the parameters, we