The Wizard asks an onlooker to hold out his or her hand. He
then tests the onlooker's reflexes by having him catch the penny
and make a fist. Too slow, says the Wizard. Then he brings out
the Sorcerer's Stone and rubs it over the person's hand and asks
him to try it again. Much faster this time. Once again he rubs
the stone around the onlooker's hand, which, he explains, makes
the person's reflexes faster, back to the reflexes of youth. One
last time and the onlooker snaps up the coin very quickly. This
time the Wizard has him turn his closed fist over, and balances
the Sorcerer's Stone on the back of the person's hand. The Wizard
leads a chant of "Transduco Aurum" by the whole
audience, and when he removes the stone from the back of the
person's hand and the person opens his fist, the copper penny is
seen to have changed to a gold or silver coin.
