Reviews provided by RottenTomatoes
Much of the humor feels tired and unfunny, and David Zucker's directing sags where it should zing.
The gags are hit-and-miss, and regardless of their success, they categorically go on too long.
What makes it to the screen feels pretty joyless.
Scary Movie 4 proves that downward momentum is still momentum, and some comedic concepts keep rolling long after they've exhausted almost all the laughs.
The perpetual engine of the unkillable Scary Movie chain is toxic cynicism.
Four installments later, the horror-movie jokes have gotten broader, grosser and just plain dumber.
Frighteningly silly, intentionally incorrect and stupendously stupid, Scary Movie 4 skewers everything in its path with a wild-eyed glee that's contagious.
As ever, the jokes are a jumble of the gross, the baggy, the raunchy, the mistimed, and -- every once in a while -- the refreshingly incorrect.
Dallas Morning News:
Like the gags, many of the cameos don't pack a whole lot of punch, but enough succeed so that the viewer leaves with a mildly favorable impression. Regrettably, this is probably more a function of human psychology than moviemaking skill.
The sort of movie you like in spite of yourself, Scary Movie 4 is obvious and dumb, but it possesses such a giddy, good-hearted spirit that even its terrible jokes (and there are tons) get by on something resembling charm.
Isn't it amazing to see just how low some people will stoop if you pay them just enough money?
With Scary Movie 4, [director] Zucker creates a virtual duplicate of the last film, replete with a Michael Jackson impersonator. Once again, the gags grow repetitive, and all the highlights have been featured in the preview trailer.
New York Daily News:
There's only so much humor left to wring from the pup tent of Brokeback Mountain or the matted-hair fetish of the Japanese horror genre.
It's a far cry from the hilarious, edgy antics of Scary Movie, but it has about as much going for it as the first sequel.
Not surprisingly, the fourth installment is a total retread of its predecessor.
Scary Movie 4 is the second to be directed by Airplane! and The Naked Gun's David Zucker and possibly the funniest one yet.
The even numbers don't favor the Scary Movie franchise. Inspiration ran dry for the Wayans Brothers in No. 2; now successors David Zucker & Co suffer gag fatigue following up their moderately improving efforts on the third installment.
Luke Y. Thompson,
The jokes miss more than they hit, but there are a lot of them, and when they work, it's gold.
Scary Movie 4 never takes you close to death by laughter, as the Naked Gun films did. But it's funny enough to turn the hands on your watch much more quickly than you can believe.