Jackson Nicoll and Johnny Knoxville in Bad GrandpaJACKASS PRESENTS: BAD GRANDPA

This might surprise a grand total of none of you, but Bad Grandpa - which also goes by the more telling title Jackass Presents: Bad Grandpa - isn't much of a movie. The first Jackass release to feature an actual narrative, and actual characters, in place of the usual parades of comically vile, violent challenges and stunts (though there are a few of those, too), director Jeff Tremaine's road-trip slapstick is mostly shapeless and certainly obvious, and nowhere near as hilarious as you want it to be.

Yet it's also a continually interesting and, in the end, rather sweet sociological experiment reminiscent of Borat, but a Borat without the mean-spiritedness. If Sacha Baron Cohen's outing, with its Candid Camera-style employment of "real people" clearly not in on the joke, reveled in displaying how crass and ignorant Americans could be, Tremaine's suggests just how tolerant and polite we can be - and given the circumstances presented here, that's apparently mighty tolerant and polite indeed.

Leslie Bibb, Justin Long, and Jason Sudeikis in Movie 43MOVIE 43

Ordinarily, Movie 43 would be the sort of unsatisfying, throwaway release that I'd dispense with in a paragraph, or maybe just a sentence or two. And it's not as though its opening-weekend box-office intake - a meager $5 million, despite the presence of nearly every star in Hollywood - necessitates longer consideration of the film. But this anthology comedy in the style of those '70s cult classics Kentucky Fried Movie and The Groove Tube seems to me a special case. How often, after all, do you get the chance to write about what might be your all-time least-enjoyable experience at the cineplex - including that time during the early '90s when you had to leave a screening for emergency root-canal surgery?

Zach Galifianakis, Jason Sudeikis, Dyan McDermott, and Will Ferrell in The CampaignTHE CAMPAIGN

As the movie's trailers have been running since what feels like the last presidential campaign, it's understandable if viewers enter the Will Ferrell/Zach Galifianakis political spoof The Campaign worried that all of the hilarious bits have already been spoiled for them. The wonderful surprise of director Jay Roach's comedy, however, is that they haven't - not unless viewers have somehow been privy to a trailer that lasts 85 minutes.

Johnny Knoxville in Jackass 3DJACKASS 3D

Well, it finally happened. Having frequently wept with laughter during MTV's Jackass series, 2002's Jackass: The Movie, and 2006's Jackass Number Two, Johnny Knoxville and his incorrigible extreme-stunt companions, in director Jeff Tremaine's Jackass 3D, got me crying for an altogether different reason.

Before our cineplexes, and this column, become completely inundated with family-oriented holiday fare such as Treasure Planet, the latest Harry Potter, and The Santa Clause 2 (which is already in release ... how is it that holiday movies, like Christmas decorations at the mall, now routinely arrive the day after Halloween?), let's take a brief look at some of autumn's more adult works, a couple of which - unsurprisingly - have already left a theatre near you.