OMG, I saw this thread the other day, but didn't realize it when I watched the movie yesterday (hence my post in "just watched" discussion). If any of you have not watched it and plan to watch it, here is my advice (another advice: You would be better off if you read this spoiler though ).....

SEMI-SPOILER ALERT ON
Pay attention to what the guy says in his reply to the cops about owning a video camera. And keep that reply in mind while watching the rest of the movie.
SEMI-SPOILER ALERT OFF

Mick, I don't know how you watched it for 3 times. To me, all those movies that hinge upon just a single line(like my spoiler above, or for example "sixth sense") of suspense, don't interest me on repeated viewings. Why not tell a plain interesting story? Do I need to get into an imaginary world for the movie to be great.