I though I was actually going to burst from trying hold in the laughter.
The film is fantasticly written. Most grown-up 'teen type' comedys have cheap laughs to fill gaps, but each and every laugh (and there were hundereds) were well written and well deliverd.
I don't wanna spoil it for anyone but some of my highlights were:
"I didnt know the holocaust gave out rings"
The taser kid
The naked Chinese man in the trunk
Good news for hangover fans... there's already plans for Hangover 2 due out May 2011! woop! :)