Ben is in the airplane and he is shot out of the sky. As he falls towards the water it is daytime, when he hits the water and goes under all of a sudden it becomes night. Now thats a VERY quick sunset
Well, actually when he went down the sun was setting, and the fishing boat that rescued him couldn't have come that fast. So, it would have been dark when he was rescued, it's not a slip-up. Even more proof, when Rafe was talking to Evelyn about the crash, he said "I was in the water for so long and it was so cold." So, there is your proof that it isn't a slip-up!
Hey all, I was just thinking about that and couldn't they have done a seen like that inside? I know with most of Titanic, it was done inside because Arctic water are just too close of a call to hypothermia, as is waters in Northern Europe. So it is a great chance that a scene like that was done inside, making the water seem a bit darker than what it really was.
AmBs, Titanic was filmed in Baja, Mexico. I doubt hypothermia would have been much of a problem if they had chosen to shoot the water scenes on location. As it is, however, most of the shots of the cast in the water were filmed on an indoor set for other practical reasons, including lighting, camera placement and control of conditions during the filming.