CHUCK LORRE PRODUCTIONS, #247 The quantum physics joke Penny tells the guys in tonight's episode was told to us by Nobel award-winning physicist, Dr. George Smoot. Penny tells it in about twenty seconds. Dr. Smoot's version probably took about three minutes, although it felt a lot longer. No one had the heart to tell him to get to the punch line, proving my hypothesis that in addition to time slowing down as you accelerate, it also grinds to a halt when you're being courteous to a genius. Thanks for the joke, Doc!