They've done similar things on the show, though they're often somewhat more clever. For example, in a famous names category, have the responses be Will Smith, Anna Nicole Smith, Joseph Smith, Dean Smith, and Quincy Jones. Or, in a hodgepodge category (I'm using overly simple clues, but you get the drift):
$200: Second letter of the Roman alphabet
$400: Infinitive of the verb whose other forms include am, is, and was
$600: A spelling or quilting contest
$800: These insects are found in the genus
Apis$1000: First name of the actress who played Blanche on
The Golden Girls.
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(Okay, admit it. How many of you missed the last one?