This movie gave ME a hangover

Rating: 3/10 (20 June 2009)

First off, we were a bit reluctant to see this movie after reading its plot summary but the rating (8.4 at the time) and all the positive user comments made us give this movie a chance.
Needless to say, we regret doing so.
Perhaps it is a mistake. Perhaps this movie should have been given 4.8 instead of 8.4 and even this would be too generous, in my opinion. The movie is not only a cliché of Hollywood bachelor's night 'what happens in Vegas, stays in Vegas' type of films, but 99.9% of the jokes were either tasteless or completely predictable. The actors did not even do a remotely good job and the screenplay writers did absolutely nothing to help them along the way.
I still want someone to explain to me what was so different about this movie..