"Saw IV" continues to surprise its fans. After the twist ending of the original, you'd think we'd be onto their game, but "Saw II" still pulled the rug out from millions of fans. "Saw III" went with a more emotional revelation in the end, but "Saw IV" promises to be back to the shocker, says director Darren Lynn Bousman.

"When I first read it, I was on page 85 but I didn’t feel any way about it," said Bousman. "I wasn’t pissed or excited really until I got to page 87. When I hit page 87, I was like 'God damn it, they got me!' And I’ve f*cking done this for the last three years and they got me and that’s when I knew that I had to come back because everything before that thing took a whole different light to it."

If the director of the previous two can still be fooled, there's a good chance audiences will fall for it too. "The end this year, yeah, there definitely is something. I’m not saying it’s a huge twist but there’s something at the very end of the movie which made it all. I was saying to someone else earlier I think the Saw films kind of to me are like magic tricks. You go in there and you’re looking for the way they’re going to do it. I know what he’s doing. He’s doing this, this, this. And then we do the trick and they’re like, 'Sh*t, we missed it.' And then you go back again to watch it again to see if you can see it."