The Hangover (2009)

The Hangover is super funny! Four best guy friends are out celebrating one of the guy's pending nuptials with a bachelor weekend in Las Vegas. The bride's brother is a few screws loose and he decides is would be a great idea to "spike" their drinks to make the night a bit better. The guys wake up to discover a lion in the bathroom, a baby in the closet, the groom missing and all of them have complete memory loss. They try to desperately reconstruct the evening's events in order to find their missing friend. They apparently have a crazy night consisting of gambling (with a creepy Chinese man as their good luck charm), steeling a lion, one of the guys marrying a prostitute, loosing teeth, etc. etc. They eventually realize that they carried the groom out onto the roof of the hotel while he was sleeping but then forgot he was up there. The poor groom spends about 24 hours on the roof... why he couldn't scream down and try to get someone's attention we don't really understand, apparently he tried to get people's attention by throwing his mattress off the roof. Regardless, they all make it back just in time for the wedding. This is quite funny and surprisingly less slap-happy stupid than you might think. I liked it!