Adewale Akinnuoye-Agbaje and Kit Harington in PompeiiPOMPEII

About a half-hour into Paul W.S. Anderson's Pompeii, the film's protagonist - a gladiator-turned-slave amusingly named Milo - hears the unfamiliar sound of the nearby Mount Vesuvius preparing to erupt. "It is the mountain," says Milo's comrade Atticus. "It grumbles from time to time." So do movie reviewers, and this latest 3D action spectacle by the director of Mortal Kombat, Death Race, and a trio of Resident Evil flicks would, at first glance, appear to be exactly the sort of thing I'd personally grumble about: a predictably corny, derivative, overscaled costume party with loads of generic violence and nothing in the way of subtlety or emotional nuance.

Yet while it's easy to name the movie's most direct influences, Gladiator and Titanic chief among them, what I didn't at all expect was for this swords-and-sandals outing to be so thoroughly, cheerfully indebted to 1970s disaster epics in the vein of The Towering Inferno and The Poseidon Adventure; Pompeii, to its cheeky credit, is kind of like 1974's Earthquake with the ancient Roman city cast in the role of Los Angeles.

Tom Hardy, Chris Pine, and Reese Witherspoon in This Means WarTHIS MEANS WAR

The latest instantly disposable, cinematic-junk-food entertainment by Charlie's Angels and Terminator Salvation director McG is the romantic-comedy action thriller This Means War, and it should be said that the first half of the movie isn't bad. It's closer to excruciating.

Ben Stiller in Night at the Museum: Battle of the SmithsonianNIGHT AT THE MUSEUM: BATTLE OF THE SMITHSONIAN

Night at the Museum: Battle of the Smithsonian is to its precursor what Ghostbusters II is to Ghostbusters: the less-novel offering, sure, but a follow-up of surprising wit and great throwaway touches, and one that, in many ways, improves on source material that was pretty terrific to begin with. Despite its titular locale, no one is going to mistake director Shawn Levy's adventure comedy for a work of art, yet when this follow-up is really working - which is surprisingly often - it provides a giddy, giggly rush, and it's filled with comic bits that you could probably watch three or four times in succession and laugh at every single time. The movie is scrappy, silly, and a load of fun.