Light on laughs, driven by a creaky plot and peppered with a plinky score, this leaves you little to do but ponder which of the annoying family members should be booted out of the car first. They’re sent barreling through contrived sitcom situations, most of which make National Lampoon’s Vacation look like an observant comedy of manners. With Cedric The Entertainer as the uptight father and Vanessa Williams as the eye-rolling mother.