Other than a few lines and Mike Tyson singing, if you were totally unfamiliar with "The Hangover" and you saw this clip, you might think this film is a drama.  The tone is just all wrong for this movie and Tyson singing Phil Collins' "In the Air Tonight" may be more disturbing than it is comedic.  You can check out the clip below and judge for yourself.  Just remember: "The Hangover" is a comedy.