I have to see it again, if only to catch the parts I missed while laughing

Rating: 9/10 (6 June 2009)

This is definitely one of the best comedies I've seen in quite some time. It get's you laughing in one way or another by being crude, surprising, shocking, and just plain weird.
The movie is about four buddies heading off to Vegas to have some fun before the Groom-to-be (played by Justin Bartha of the National Treasure movies most notably) is to be wed. The hi-jinks ensue the morning of the hangover as they are left wondering what happened and how it happened.
Each of our main four actors adds their own brand of humor to the movie, but I thought Ed Helms and Zach Galifianakis stood out and made the movie especially funny.
I'd definitely suggest one checks this movie out on video, if not in the theaters. But, this movie earned its R rating, so I wouldn't recommend letting the youngest of children watch it.