Saw IV courtesy Lionsgate Films Saw IV courtesy Lionsgate Films

The unscreened-for-critics Saw IV topped the weekend box office with $32.1 million, just shy of the $33.6 mil that Part 3 drew in its own debut. That was plenty enough to trump Steve Carell's Dan in Real Life, which opened with $12.1 mil.

Rounding out the weekend's top five were 30 Days of Night ($6.7 mil), The Game Plan ($6.3 mil) and Tyler Perry's Why Did I Get Married? ($5.7 mil).

Among other, narrower releases, Before the Devil Knows You're Dead opened strongly, while the doc Jimmy Carter: Man from Plains came away with peanuts - $10,573 at seven screens.