A man with a shaved head, a man with a face tattoo, a clothed monkey, and Bradley Cooper walk down the streets of Bangkok. What’s the punchline? We don’t know yet! (Twist!) The first teaser for Todd Phillips’ follow-up to his 2009 hit, The Hangover, has hit the Web — and it looks like the director is still attempting to keep the film’s plot under wraps. (Even when baited by EW, Phillips remained mum on details.) I will say, though: If we can’t have Carlos in The Hangover Part II (out Memorial Day), I will settle for the monkey. But where’s Justin Bartha’s Doug? Dude’s gotta start wearing a bell. See the trailer after the jump!