pratfall [ˈprætˌfɔl]

例句:

• Every joke, move, pratfall and unexpected insanity is planned and consummately executed.
  来自THETIMES
• They're waiting for the poor little rich girl to take a pratfall.
  他们等着瞧那个可怜的富家小姐出丑。
  
• On and on he stumbled, a long and lovely pratfall.
  来自NEWYORKER
• Fermilab's director said they had committed a pratfall on the world's stage.
  来自SA