That reminds me, especially with the Yoda reaction. At a friend's memorial service over the weekend, they told this story:
My friend Bill was at a con, and was at the the signing table next to Mark Hamill. As you might guess, Hamill had a huge line, and Bill had comparatively few.
When there was finally a breather, Mark turned to Bill and asked his name.
Bill answered, "I am Obi-Hind, Jedi Proctologist. These are not the 'roids you're looking for."
Hamill fell out of his chair laughing.