Sell Me This Pencil

Here's a list of 100 Great Interview Questions, that includes most of the obvious ones, such as "What are your weaknesses?" and "What's your ideal company?" etc. 

However, there was one "question" that stood out to me above all others:

Sell me this pencil.

Think about that for a moment.  The question doesn't require an answer, it requires a performance.  I wonder how it might impact hiring by law firms if their interviewers asked it just once in a while...