Rusty Griswold, the son in National Lampoon’s Vacation (1983), is all grown up now, and because fate is cruel, he’s turned into Ed Helms. This respectably funny sequel to the Harold Ramis comedy follows Rusty, his sunny wife (Christina Applegate), and their two boys on a road trip from Chicago to southern California, where Rusty hopes to renew their family bonds by returning to the Walley World theme park of the original movie. Writer-directors John Francis Daley and Jonathan M. Goldstein spend much of the movie tipping their hats to Ramis (numerous gags revolve around the family’s ugly, dysfunctional rental car) and the rest of it addressing the touchstones of contemporary movie comedy (male sexual embarrassment, male professional embarrassment, male physical embarrassment, and poo). With Chevy Chase and Beverly D’Angelo, reprising their roles from the original cycle.