The best way to ensure that what happens in Vegas stays in Vegas is to make sure you can't remember a damn thing. At least that's the philosophy of The Hangover, a movie that mines the comedic possibilities of being blackout drunk. Hooray for dangerous binge drinking!

The best way to ensure that what happens in Vegas stays in Vegas is to make sure you can't remember a damn thing. At least that's the philosophy of The Hangover, a movie that mines the comedic possibilities of being blackout drunk. Hooray for dangerous binge drinking!

It marks a return to Frat-Pack form for director Todd Phillips, and it's the closest he's come to recapturing the silly magic of Old School. It helps that he's assembled an ideal cast - the underrated Bradley Cooper (Wedding Crashers), Daily Show alum Ed Helms and the big-bearded Zach Galifianakis.

Three groomsmen (the aforementioned trio) take a buddy (Justin Bartha) to Vegas for a bachelor party night they will never remember. They awaken in a hotel room, trashed Fear and Loathing-style, with no groom and no recollection of the events that took place. Hilarity of varying degrees ensues.

The Hangover is unapologetically low-brow and lacks the underlying heart of recent breakout comedies like 40 Year Old Virgin. There aren't a ton of gut-busting gags, but it feeds you a steady diet of snicker-worthy moments.

The biggest laughs tend come from Galifianakis. He is to this movie what Will Ferrell is to Old School. If he doesn't become a star, I don't know funny.

Best of all, the laughs will stick with you for days. The guys might not remember the details of their night, but I'm still getting a chuckle every time I do.