A long time ago in a galaxy far, far away, I was a stock boy at a grocery store. We had a butcher - Frank was his name - that was a chronic braggart. Anything anyone could do, he claimed he did it better.
One day, he was relating tales of his greatness to a group of us 16 and 17 year olds. He stated at some point, that he can do anything - just ask.
A fellow stock boy stretched out a slightly raised arm, and with deadpan face, snapped his fingers and in even tone said ..."Can you do this?"
BTW, the best (and the only one, AFAIK) butcher movie ever:
http://www.imdb.com/title/tt0048356/