It's a teaser, not a trailer.
And to whoever the fuck said "Pineapple Express was much better than The Hangover"...how would these movies even compare, you dilweed?
One is about getting fucking smashed for a bachelor party and slowly regaining memories of the previous night while searching for the missing bachelor, and the other is about two stoners running away from drug lords and dirty cops for witnessing a murder, finally ending in a gratuitously violent shootout scene.
What is this I don't even...fucking idiots.