The trailer for The Hangover Part II didn't seem to have any egregiously controversial material in it. Sure, there was a scene of a monkey fondling a guy's crotch with a water bottle shoved in his pants (the guy's pants, not the monkey's), but this is pretty typical Saturday morning material nowadays. So it's pretty much a mystery why Warner Brothers and the MPAA sent out a notice to movie theaters across America asking them to delete the trailer from their servers. You can see a photo of the notice below that comes from /Film, and you'll notice that no reason is given. Perhaps an explanation will be provided at some point in the future, but until then, I'm just going to assume it was the monkey handjob.

Oh, to be a fly on the wall during the late-night phone call that led to this: "Our people just checked out the Hangover 2 trailer. My god, there's a monkey handjob in it! Send out the fliers, stat!" And it was done. Life as a movie executive is hard.