How do you improve on the high-stakes, low-brow hilarity of 2009's "The Hangover"? Apparently, you relocate the boys from Las Vegas to Thailand, toss in a monkey and some firearms, and shave Zach Galifianakis' head for that full, biker-bar-of-your-nightmares effect.
The full trailer for Todd Phlllips' "The Hangover Part II" -- in theaters on May 26 -- has been unleashed on the Internet like a three-megaton warhead filled with pratfalls and genitals jokes. Watch Phil, Stu, Alan and Doug Thai one on in the video below.
