Funny / American Graffiti

  • Toad trying to purchase booze without an ID.
    • Also, his attempt to race with another kid coming out of a red light. And his exchange with the fast-talking, ultra-high-pressure used car salesman.
    • After he accidentally shifts into reverse and backs into the car behind him during the aforementioned race attempt:
      Man: Excuse me, but I think we've had an accident.
      Toad: Well, goddammit, I won't report you this time, but next time just watch it, will ya? [drives off]
  • Steve baiting the jerkass principal at the school dance into suspending him, then reminding him that he already graduated months ago.
  • Curt nervously chatting with the arcade owners while the Pharaohs clean out the money from the machines.
    Owner: Goodbye, Curt. I want to tell you I hope you'll be taking along a little piece of this place.
    Curt: I think I have.
  • Carol's attempt to insult Bob Falfa goes wrong:
    "YOUR CAR'S UGLIER THAN I AM! (to John) That didn't come out right."
  • Bob Falfa singing "Some Enchanted Evening" from South Pacific to Laurie. The fact that it's Harrison Ford singing makes it even funnier.
http://tvtropes.org/pmwiki/pmwiki.php/Funny/AmericanGraffiti