The porno made her giggle! (and other spoilers)
Her boyfriend has been abducted and is probably dead while she is stranded at a rest stop (that she could have left from on foot) and a maniacal serial killer is tormenting her. Nothing to lighten the mood and put a chuckle on your face like a little home-made porn, huh? I especially liked how she glanced around after giggling at it as though she was embarrassed that she might be caught watching and enjoying it. If she hadn't soon discovered that she was the star of the film I fully expect that she would have casually slipped one hand down her pants and kept on watching. It was this moment that I realized that this movie was doomed to be a piece of crap, and I was right.
So evidently from other threads, I gather that the killer was supposed to be a ghost. If that is so, then why blow up the bathroom? He could have just walked through the bathroom wall, or manifested himself inside. He was obviously capable of doing this because he did it at the end when she blew up his truck and he magically appeared behind her out of nowhere.
Also, shouldn't the ghost cop have known that the guy in the truck was a killer? After all, he was killed by him once already. The other victim ghosts didn't seem to have a problem remembering and knowing who the killer was.