The magician tells the audience that he was visiting a volcano's crater recently, when something unexpected happened to one of the props he had with him (because no great magician leaves home without his cards, dice, coins, etc.). When he reached the top of the volcano the die fell out of his pocket and into the crater. It completely disappeared! As he tells this story, he removes a jumbo die from a shiny cube and puts it on the table. The jumbo size of the cube and the die makes the audience chuckle. Only a magician would have a jumbo cube and die in his pocket?
“Oh my God! My favorite die! But a miracle happened. The volcano gave my die back...but in several pieces!” A snap with the fingers and while lifting the silver cube, several small dice tumble onto the table in place of the jumbo die! 
The magician tosses the shiny cube in the air, showing it completely empty!